Client/Server System Administrators Guide

System Administrators Guide
Client/Server Version
Freezerworks Unlimited
Version 6.0
PO Box 174
Mountlake Terrace, WA 98043
877-289-7960 U.S. Toll Free
This is a legal agreement between you (either an individual or an entity) and Dataworks Development, Inc. (Dataworks).
GRANT OF LICENSE: Dataworks grants to you the right to use one copy of this Dataworks software program (Freezerworks) on
a single computer. Freezerworks is in "use" on a computer when it is loaded into temporary memory (i.e., RAM) or installed into
permanent memory (e.g., hard disk, CD-ROM, or other storage device) of that computer. However, installation on a network
server for the sole purpose of distribution to one or more other computer(s) shall not constitute "use" for which separate license is
COPYRIGHT: Freezerworks is owned by Dataworks and is protected by United States copyright laws and international treaty
provisions. Therefore, you must treat Freezerworks like any other copyrighted material (e.g. a book or musical recording) except
that you may either (a) make one copy of Freezerworks solely for backup or archival purposes, or (b) transfer Freezerworks to a
single hard disk provided you keep the original solely for backup or archival purposes. You may not copy the written materials
accompanying Freezerworks.
OTHER RESTRICTIONS: You may not rent or lease Freezerworks, but you may transfer Freezerworks and accompanying
written materials on a permanent basis provided you retain no copies and the recipient agrees to the terms of this Agreement. You
may not reverse engineer, decompile, or disassemble Freezerworks. If Freezerworks is an update or has been updated, any
must include the most recent update and all prior versions.
LIMITED WARRANTY. Dataworks warrants that Freezerworks will perform substantially in accordance with the
accompanying written materials for a period of sixty (60) days from the date of receipt.
CUSTOMER REMEDIES. Dataworks and its suppliers' entire liability and your exclusive remedy shall be, at Dataworks' option,
either (a) return of the price paid, or (b) repair or replacement of Freezerworks that does not meet Dataworks Limited Warranty and
which is returned to Dataworks with a copy of your receipt. This Limited Warranty is void if failure of Freezerworks has resulted from
accident, abuse, or misapplication. Any replacement software will be warranted for the remainder of the original warranty period or
thirty (30) days, whichever is longer. Outside the United States, these remedies are not available without proof of purchase from an
authorized non-U.S. source.
In no event shall Dataworks or its suppliers be liable for any damages whatsoever (including, without limitation, damages for loss of
business profits, business interruption, loss of business information, or any other pecuniary loss) arising out of the use of or inability to
use this Dataworks product, even if Dataworks has been advised of the possibility of such damage.
Copyright 2013 Dataworks Development, Inc. All rights reserved.
Copyright 4D, SA 1985 – 2013. All rights reserved
NT, XP, Windows are registered trademarks of Microsoft Corporation, Redmond, WA
Fourth Dimension is a registered trademark of 4D, Inc., San Jose, CA
Macintosh is a registered trademark of Apple Computer, Inc., Cupertino, CA
Freezerworks is a registered trademark of Dataworks Development, Inc., Mountlake Terrace, WA
Adobe Acrobat is a registered trademark of Adobe Systems, Inc., San Jose, CA
For purposes of this guide, Freezerworks and Freezerworks Unlimited may be used
Freezerworks is a registered trademark of Dataworks Development, located in Mountlake Terrace,
This manual makes reference to 4D and 4D products. 4D is a trademark of 4D, Inc. of San Jose,
California. 4D, Inc. is a privately-held company and the U.S. subsidiary of 4D SA of Clichy,
File Locations at Installation ............................................................................................................... 1
Windows ......................................................................................................................................... 1
Macintosh ....................................................................................................................................... 3
Creating New Data Files ...................................................................................................................... 3
Link between structure file (*.4dc) and data file (*.4dd) ................................................................ 3
Sending Data Files to Dataworks Development.................................................................................. 4
ShareFile Security............................................................................................................................ 4
Using Freezerworks Unlimited Server................................................................................................. 5
Freezerworks Server’s Integrated Client/Server Architecture ....................................................... 5
Opening the Freezerworks Unlimited Server Database ................................................................. 6
Closing the Freezerworks Unlimited Server Database ................................................................... 7
Freezerworks Unlimited Server Administration Window ............................................................... 8
Freezerworks Unlimited Server Menus ......................................................................................... 14
Using Freezerworks Unlimited Client ............................................................................................... 30
Troubleshooting Problems with the Client/Server Connection........................................................ 33
Error Messages ............................................................................................................................. 37
Client/Server System Administrators Guide
File Locations at Installation
When Freezerworks Unlimited is initially installed, nothing is written in the registry. All necessary files and
information/data for running the program are located in the folders discussed in the sections below.
The Server application main files are located in the FreezerworksUL6xServer folder.
The data file (.4DD) and Freezerworks application main files are located in the Server Database subfolder:
The *.4dc file (seen here as FreezerworksUL60.4dc) is the “structure file” where the code and SQL database
elements are kept. When updates are sent out, it usually entails overwriting this file with a new file of the
same name. This file should be included in the backup.
User data is kept in the *.4dd file (seen here as FreezerworksUL60.4dd.) Data files can be renamed anything,
but must have the .4dd extension. The default data file name is FreezerworksUL6x.4dd. This file should be
included in the backup.
The Index file for the data has the same root name, but with a “.4DIndx” extension. In previous versions of
Freezerworks, compacting a data file was the best way to rebuild indexes. Beginning with version 5.0, to
rebuild the indexes you merely delete the Index file (after shutting down the server application). Then,
when you re-launch the server, Freezerworks will automatically rebuild the indexes and replace this file.
The *.4DIndy file is an index for the structure. It is used by 4D to quickly find information about tables, fields,
etc. If deleted, it will be recreated by Freezerworks UL Server.
The Match file, (*.Match) links table files with their universally unique IDs.
Freezerworks Client
When you install a copy of the Freezerworks Unlimited Client, a folder is created called
FreezerworksUL6xClient and the default location is in the root folder:
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Freezerworks Unlimited Server is contained in one file on the Macintosh, FreezerworksUL6x Server. The data
default name is Freezerworks Unlimited Client on the Macintosh will be contained
in the file: FreezerworksUL6x Client.
Creating New Data Files
Link between structure file (*.4dc) and data file (*.4dd)
Only one data file can be opened at one time, or served at one time if you are running under Client/Server.
The compiled application structure file (*.4dc in Windows) is uniquely linked to the data file (*.4dd in
Windows). This means that you cannot open a new data file without installing a “clean” *.4dc file as well. By
clean, we mean that it has not been used to open a data file yet. To install a clean structure file, it is only
necessary to copy it over the existing structure of the same name (e.g., FreezerworksUL60.4dc).
If you attempt to open a data file using Server, and are using a structure file that has earlier been linked to
a different data file, you will receive this error message:
The data file does not match the structure – you will need to copy over a “clean” structure file to
open this data file.
To create a new data file
If you have been using Freezerworks in a test situation and are now ready to start over with live data, you
may create a new data file.
1. Close Freezerworks Unlimited Server, if it is running.
2. Copy a clean version of FreezerworksUL6x.4dc over the file of the same name in the server database
3. Start Freezerworks Unlimited by double-clicking the desktop icon or FreezerworkUL6xServer.exe.
Hold the Alt key (Option on Mac) immediately after double-clicking the desktop icon. You should see
this window:
4. Select Create a new data file, and then click Continue.
5. Enter a new file name in the file name box. The program will automatically add the .4dd extension.
6. Click Save. Freezerworks will create a new, blank data file and Server will open using this file.
7. Start Freezerworks Client (if necessary, select the Freezerworks Server TCP/IP connection as
8. Enter the program serial number, or leave blank to make this a DEMO data file.
Log in as “Admin” with no password.
Sending Data Files to Dataworks Development
There may be times when problems with your data file make it necessary for you to send it to Dataworks
Development for troubleshooting. Dataworks Development uses ShareFile ( to
send and receive large files securely via the web.
ShareFile Security
Each user of the system has a unique login and password. All user passwords are hashed in the ShareFile
database, meaning that not even the ShareFile support personnel have the ability to view or in any way
determine a user's password.
All communications between ShareFile and the user are encrypted using the Secure Socket Layer (128-bit
To send data files to Dataworks Development
1. Close Freezerworks if it is running.
2. Back up the data and compiled database files. The Freezerworks data file(s) will be located in the
Server Database folder. The default database filename is FreezerworksUL6x.4dd.
3. Compress the file(s) using WinZip or Stuffit.
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4. Dataworks support staff will send you an email requesting that you upload a file.
5. Upon receipt of the email message, click the Click here to upload link, or copy and paste the link
provided into your web browser.
6. An Upload Files page will appear. Click Choose Files and select your compressed file from the
dialog. Follow the instructions on the screen if you must select more than one file.
7. The Title will automatically be the name of your file. Enter Details if you wish to send additional
information or questions to Dataworks.
8. Click Upload Files. A file progress indicator will appear. A Files Uploaded Successfully dialog will
appear after the file is uploaded. Dataworks’ support staff will automatically receive an email that
your file has been uploaded.
9. Close your web browser to exit ShareFile.
Using Freezerworks Unlimited Server
Using client/server architecture, the Freezerworks Unlimited Server not only stores and manages the
database, it also provides services to the clients. These services are managed over a network through a
system of requests and responses.
To search for a set of records, for instance, a client machine sends a query request to the server. Upon
receiving the request, the server executes the query operation locally on the server machine and, when the
query is completed, returns the result (the records found).
Freezerworks Server’s Integrated Client/Server Architecture
In most client/server architectures, the client and server software consist of two separate products that
require a communication layer to “speak” to one another. With Freezerworks Server, the client/server
architecture is fully integrated. Freezerworks Server and Freezerworks Client are two applications that
share the same structure and communicate directly.
Since Freezerworks Server and Freezerworks Client speak the same language, the query language does not
need to be translated. The division of labor between the client and the server is transparent and is
managed automatically by Freezerworks Server.
Freezerworks Client is responsible for:
Requests: Freezerworks Client sends requests to Freezerworks Server. These requests include adding,
modifying, and deleting records as well as structured queries.
Receiving responses: Freezerworks Client receives responses from Freezerworks Server and updates the
user through the user interface (different records are displayed in a form, etc.). For example, if the client
requests all records with the last name “Smith”, Freezerworks Client receives the records from
Freezerworks Server and displays them in a form.
Freezerworks Server is responsible for:
Scheduling: Freezerworks Server uses multi-tasking architecture to schedule all simultaneous connections
and processes created by clients.
Structure and data objects: Freezerworks Server stores and manages all data and structure objects,
including fields, records, forms, methods, menus, and lists.
Cache: Freezerworks Server maintains a central cache which contains records, as well as data objects
specific to particular clients, such as selections and sets. Data is sent from one central location, so clients
are assured of always receiving the latest version of a record.
Low-level database operations: Freezerworks Server performs low-level database operations, such as
queries and sorts, that involve using the index and address tables.
This division of labor is extremely efficient because of the unique integration of Freezerworks Server and
Freezerworks Client. The integration of Freezerworks Server’s architecture is present at every level:
At the request level: When Freezerworks Client sends a request to Freezerworks Server, such as a query or
a sort, Freezerworks Client sends a description of the query or the sort operation using the same internal
structures found in Freezerworks Server.
At the structure or data level: When Freezerworks Client and Freezerworks Server exchange a data or
structure object, both applications use the same internal format. For instance, when Freezerworks Client
needs a record, Freezerworks Server sends the data exactly as it finds it in the disk or memory cache. In the
same way, when Freezerworks Client wants to update a record, Freezerworks Client sends the data to
Freezerworks Server, which stores it in cache exactly as it was received.
Opening the Freezerworks Unlimited Server Database
Start Freezerworks Server by double-clicking the FreezerworksUL6x.exe icon or application.
Freezerworks Server starts serving the database and displays this monitor window:
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Closing the Freezerworks Unlimited Server Database
On the File menu, click Quit. The Server Shut Down dialog box is displayed:
If no users are connected, clicking OK will immediately close the server.
If users are connected, enter the number of minutes in which you want the server to shut down, or select
the Wait for all Users to disconnect option. After you specify the amount of time and close the dialog box,
the server will automatically warn the clients that it will be shutting down:
When this message is released on the system, no new client workstations can be connected to the
Freezerworks Unlimited Server Administration Window
The Freezerworks Server Administration window contains the information and options necessary to
manage various aspects of your database system for administrative purposes. This includes several pages
that are accessed through tabs:
The Monitor page displays dynamic information concerning database operation as well as information
about the system and the Freezerworks Server application. Here you can see how much hard drive and
memory is being used by Freezerworks, how many bytes per second are being sent and received at any one
The System Information section displays the server’s IP address, and which version of 4D your copy
of Freezerworks is built on (currently 13.3). A running graphic window at the top illustrates how
much CPU usage Freezerworks is accessing at the current time.
The Users and Processes pages indicate, respectively, the number of users connected to the database and
the number of processes currently running. The former is useful for locating who is currently logged in:
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At the bottom of this screen are some useful options. Highlight the user(s) you want to manage at this
screen and select any of these three:
Send Message: Enter a message and send it to the user.
Watch Processes: Allows you to see which options a user is currently accessing. For example, we
can see in the window below that the user is currently Viewing Samples and is accessing the Users
Drop User: allows you to disconnect a user from Freezerworks.
The Maintenance Page offers options for data file diagnostics.
Verify Records and Indexes
IMPORTANT: DO NOT USE THIS OPTION. A current issue with the tool may cause data corruption.
Compact Data: Not applicable.
Uptime: This area indicates the duration of the server operation since the last time it was
started (days, hours, and minutes).
The Restart server button can be used to immediately restart the server. When you click this button,
the 4D Server database shutdown dialog box appears so that you can choose how to interrupt the
operation. The default will look like this:
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After restarting, the Server automatically launches the database. The users can then be
Last backup: This area indicates the date and time of the last backup of the database and provides
information about the next scheduled automatic backup (if any). Automatic backups are configured
using the "Scheduler" page at Edit-Preferences. You can also access the scheduler page by clicking
the Preferences button here.
Next backup: This displays the date and time of next automatic backup.
Needed space: This is the estimated space needed for the backup. The actual size of the backup file
may vary according to the settings (compression, etc.) and according to variations of the data file.
Available space: This is the space available on the backup volume.
The Start backup button can be used to back up the database immediately using the current
backup parameters (files backed up, location of archives, options, etc.). You can view these
parameters by clicking on the Preferences button. During a backup on the server, the client
machines are "blocked" (but not disconnected) and it is not possible for any new clients to connect.
Request log: This area indicates the duration of recording log requests, when it is activated. The
request log file stores information concerning the requests received by the server (excluding Web
requests): time, process number, user, request size, processing time, etc. that can be used to
analyze the server operation. This file is named 4DRequestsLog_X (X being the sequential number of
the file) and is stored in the Logs folder of the database. Once the file reaches the size of 10 MB, it
is closed and a new file is generated, with an incremented sequential number.
The Start request log button can be used to generate a new file and activate the recording of
requests. Since this may noticeably deteriorate server performance, it is normally reserved for the
development phase of the application. Therefore it is not applicable to end user maintenance use.
Once the request log has been activated, the button title changes to Stop request log, so that you
can stop the recording of requests at any time. Keep in mind that restarting the request log after
stopping it "erases" the previous file.
The View Report opens a system window displaying the request log file.
The Application Server page displays general information about the Freezerworks application. Some of
these settings may be configured at Edit-Database Settings:
Structure File: The name and location of the structure file (compiled program) opened by
Freezerworks Server.
Data File: The name and location of the data file opened by Freezerworks Server.
Log File: The name of the log file created to keep track of database operations. A log file can be used
to restore data. Log files can be created only if you have selected the Use Log file check box in the
Edit – Database Settings – Backup – Configuration menu.
Launched as Service: Whether Freezerworks is currently running as a service.
IP and Port addresses.
SSL Enabled: Indicates if Freezerworks Server is sending and receiving encrypted messages over the
Total and Used Cache Memory: The amount of memory allocated to and currently being used by
the cache. The size of the cache controls the amount of data that can be kept in memory, which
determines the number of times the disk is accessed. On both Macintosh and Windows, you
allocate cache memory using the Edit – Database Settings option within Freezerworks Server.
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The SQL Server page groups together information about the integrated SQL server. It also includes a button
that can be used to control the activation of the server.
The upper part of the page provides information about the current status of the SQL server of
Freezerworks Server.
State: Started or Stopped
Starting time: Date and time the SQL server was last launched.
Uptime: Time elapsed since last startup of the SQL server.
Stop SQL Server: This button turns off the SQL Server. This will prevent Freezerworks from
functioning properly as SQL queries are used internally. DO NOT CLICK THIS BUTTON!
Configuration: This area provides information about the SQL server configuration parameters:
automatic launching on startup, listening IP address, TCP port (19812 by default) and enabling of SSL
for SQL connections. These parameters can be modified via the
Edit-Database Settings.
Connections: Number of SQL connections currently open on Freezerworks5 Server.
Maximum Connections: Number of simultaneous SQL connections allowed.
The HTTP Server page is not applicable, unless you are running the SOAP Module.
Freezerworks Unlimited Server Menus
File Menu
New, Open, and Open Recent serve the same function as double clicking the Freezerworks EXE and
holding down the ALT key. It is important to remember that with version 6.x of Freezerworks, if you
are opening a new data file, you will need to copy over a new (unused) structure file
(FreezerworksUL6x.4dc) file as well.
o New: From here you can create a new, blank data Freezerworks Unlimited data file. To do
this, select New-Data File. Do not use other options at the New menu.
o Open: Allows you to open a different data file from the one currently open. This is not
allowed in Freezerworks Server.
o Recent: displays recently opened data files.
Close Database: Shuts down Freezerworks Server. You will get the option of disconnecting all users
in a certain amount of time, waiting for all users to disconnect, or force quitting all users. A dialog
box allows you to send a message to all logged in users as well.
Close Window/Close All Windows: Hides the Administration Window or any other Freezerworks
Server window currently open. Use the Window menu to open it again.
Register Current Database as Service
Unregister Current Database
Unregister all Server Services
Freezerworks Server can be launched as a Windows Service.
A Windows Service is an executable object that is installed in a registry database maintained by the
service control manager. The services database includes information that determines whether each
installed service is started on demand or is started automatically when the system starts. The
database can also contain logon and security information for a service so that a service can run
even though no user is logged on. It also enables system administrators to customize security
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requirements for each service and thereby control access to the service. No more than one instance
of a service can be running at a time.
When a 4D Server database such as Freezerworks is registered as a service, it can be launched
automatically at system startup and is not shut down when the user terminates the current
Windows Log session.
To Register Freezerworks Unlimited Server as a Service on Windows
You can set the service to log on as a specific user, or as the Local System account. If you choose to log on
as the Local System account, you also will have the option to Allow service to interact with desktop. With
this option selected, the Freezerworks Server program will be visible on the server, and you will be able to
configure backups, see which users are logged into Freezerworks, etc.
Note that if you don't select the option Allow service to interact with desktop, Freezerworks Server will be
running in the background. You will have to stop the service and open Freezerworks Server as an
application if you want to configure any Freezerworks options (backup, cache settings, etc.).
See Tip: Interact with the Freezerworks Desktop for information about interacting with the desktop on
Windows Server 2008.
Verify that the path name containing the Freezerworks Server application has no spaces in it.
Replace any spaces with an underscore "_" if necessary.
2. If you decide to start the service logged on as a specific user, note the Account Login Name and
Password used to log into the server PC. If you log on as a specific user, Freezerworks Server will be
running in the background. You will need to stop the service and open Freezerworks Server as an
application if you need to configure any Freezerworks Unlimited options (backup, cache settings,
3. Verify there is a default printer assigned to the Account used to log into the server PC. It is not
necessary to have a printer attached to the server; Freezerworks Server only requires a printer in
the Printers folder.
4. Start the Freezerworks Server application.
Important: When starting Freezerworks Server, right-click the application (EXE) and select Run as
administrator; otherwise, the Service menu options will not be available.
5. Select File-Register Current Database as Service.
6. Select File-Quit.
7. Select Control Panel-Administrative Tools-Services from the Windows Start menu.
8. Right-click 4D Server: FreezerworksUL60 and select Properties. Switch to the Log On tab.
To run the service as a specific user, select the This Account radio button. Enter the Account
User Name and Password used to log onto the server PC. Click OK to exit the service
Warning: Be sure to define a valid Windows account in the Log On As area. In addition, this user
account must have access to a printer; otherwise an error message will be displayed.
To run the service as the Local System account, select the Local System account radio button.
You can select the Allow service to interact with desktop check box. This will allow the
Freezerworks Server to be visible on the screen, so you can configure backups, see which users are
logged on, etc.
9. Click OK to exit the service properties. Note that if you don't select the Allow service to interact
with desktop check box, Freezerworks Server will be running in the background. You will have to
stop the service and open Freezerworks Server as an application if you want to configure any
Freezerworks options (backup, cache settings, etc.)
10. Right-click 4D Server: FreezerworksUL6x and click Start.
If Freezerworks Server starts without error, exit and return to the Services dialog. You may then change 4D
Server: Freezerworks* Properties to Startup type: Automatic.
If an error appears indicating that there is no default printer set, stop the service. Go to Settings-Printers
and confirm that at least one printer exists. If there are no printers, add a local printer. It is not necessary to
have a printer attached to the server; Freezerworks Server just needs to see a printer in the Printers folder.
After adding a printer, return to step 9 above and start the service.
You cannot change the service registration status of Freezerworks Server from within Freezerworks Server
if the application has been launched as a service when Windows was started. In this case, the three menu
items are disabled. To stop the service, use the Windows Services Control Panel.
Warning: The full path name for your database structure file FreezerworksUL6x.4dc) cannot exceed 250
Unregister Current Database: To unregister your database, select Unregister Current Database
from the Freezerworks Server File menu. This command is dimmed if the database is not
registered as a service. You will have to stop the service and manually enter Freezerworks
Server to unregister it.
Flush Data Buffers: This command can be used to "force" the saving of data in the cache to the
disk. By default, Freezerworks Server automatically flushes the cache after the time limit set in
the database preferences (Database/Data Management page).
Backup: This option will begin a backup operation of your data file and any other files you have
included using the Backup configuration settings you select by selecting Preferences.
For a detailed discussion about backup Configuration, Log files, backup Scheduling and Restore
refer to the Backup section, located in the Edit Menu section.
To perform a backup here, click Backup.
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To restore a backed up file
1. Locate the backup file (*.4bk) you want to restore.
2. Select the *.4BK file and then click Open. The program will display the destination location of the
restored files. Take note of the location, and then click Restore in the following screen:
A message will indicate if the restore was successful.
3. Copy the restored *.4dd and .4dc files into the Server Database folder. Also locate and move your
log file (*.journal) so that it resides in the same folder (Server Database) as your restored data file.
In order to incorporate the changes made after the backup, it must be in the same folder as the
current log file.
Since the older, potentially corrupted data file in the Server Database folder has the same name,
Windows will warn you and ask if you want to copy over the existing file with the new backup file. It
is a good idea to copy the old *.4dd and .4dc files to a temporary location before replacing it here,
in case it needs to be retrieved for any reason.
4. Then, to access the restored file and integrate the log file changes, double-click the
FreezerworksUL6 Server icon to start the program. Since the data file name hasn’t changed and the
backup is in the same folder as the original data file, Freezerworks Server should load the backup
file. If it doesn’t for any reason, locate and select the restored data file (*.4dd) file. Click Open.
Please Note: If for any reason you do NOT want to incorporate the log file, keep the log file
(*.journal) out of the Server Database folder.
5. If your log file has not been moved out of the Server Database folder, then Freezerworks Server will
now integrate your log file and open the restored data file. If the backed up data file (*.4dd) and a
copy of the current log file (*.journal) are not included in the same folder, Freezerworks Server will
not be able to locate the log file and, you will get this message:
The correct log file for this data file could not be found. You can try to locate the current
log file or you can create a new one. If you decide to create a new one, the log file will not
be activated until the next backup.
Important: Do not move your log file from the location at which you set it, which is the same
location Freezerworks has used to write to it. If you move the log file to another location,
Freezerworks will not be able to integrate it at this time. It must be returned to the original location
where Freezerworks expects to find it.
If your intention is to scrap the old log file, disregard data changes made since your backup, and
start a new log file, click Create to create a new log file.
Since a log file cannot be active until there is a backup file to relate it to, Freezerworks Server will
offer to create the backup file now.
6. Click OK.
7. After the backup is complete, Freezerworks Server will display the data file and log file on the
Application Server page.
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Quit: Closes Freezerworks Server.
Edit Menu – Database Settings
This option displays (under Windows) the Database Settings screen of the application. This is used to
define numerous functions of the database. Only the areas that are configurable by the system
administrator for the proper functioning and maintenance of Freezerworks Server will be addressed here.
All other areas should be left as shipped to avoid errors in the functioning of Freezerworks.
The Database page has two tabs: Data storage and Memory. The settings on Data storage should be left as
shipped. The settings on Memory may be used to configure the Database Cache Settings.
The cache is the working memory of the Freezerworks application. It stores copies of any records that have
been returned from a search, data indexes, database structure and other objects. The more operations
being performed, and the larger the amounts of data being manipulated at a given time, the more cache
will be needed.
Typically, a larger cache is better for performance. The one exception is if you make the cache so large that
it will not fit in RAM. It is actually slower to have a large cache than to have a smaller cache that all fits in
When the cache fills up, it will clear 25% of the objects in memory to free up space for the next operation.
If that isn't enough, it will clear the remaining objects from cache. If the cache is large enough it doesn't
have to do this very frequently; operations are fast since the data is cached in RAM, and does not have to
be pulled from the disk each time it is needed.
The amount of data in cache can also be lowered when the "FLUSH BUFFERS" interval is reached. This tells
the system to write any changes to records to disk so that they are permanently saved. Until that time, the
changes are stored in cache, and if the system were to crash they would not be present in the database
when it restarted.
In this image we see a cache that is too small. It is regularly emptying 100% of the cache to make more
room. This system would be slow as every operation would have to get resources from the disk.
By default, Freezerworks ships with the Calculation of adaptive cache setting enabled. In this setup the
system looks at how much physical memory is installed on the machine and asks for half (by default). The size
of the cache is not dynamic. It does not take into account how much resources are required by the
operating system or other applications. Best practice is to manually set the amount of cache based on the
operating system, the RAM installed, and other system requirements. To do this, clear the Calculation of
adaptive cache check box and enter an adaptive cache size.
The maximum allowed cache memory is 2384 MB. If Freezerworks is the top priority for the server, this will
provide you maximum performance.
DO NOT enable the Keep the cache in physical memory option.
Flush Data Buffers Every … Minutes: Specifies the time period between each automatic saving of the data
cache, i.e., its writing to disk. Freezerworks saves your data at regular intervals. You can specify any time
interval between 1 and 500 minutes. As a default, Freezerworks Server saves your data to disk every 2
minutes. The application also saves your data each time you exit the application. When you anticipate
heavy data entry, consider setting a short time period between saves. In case of a power failure, you will
only lose the data entered since the previous save.
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If each save involves a noticeable slowing down of disk activity, it is a sign that you should adjust the setting.
This slowness means that the program is saving many records to disk. A shorter period between saves
would therefore be more efficient since each save would involve fewer records and thus be faster.
The Backup page has three tabs: Scheduler, Configuration, and Backup & Restore. It provides tools to
configure and schedule the backups.
The Scheduler tab is used to set up the timing of the backups. Backup can be automated by setting a
backup frequency (in hours, days, weeks or months); for each session, Freezerworks Server automatically
starts a backup using the backup settings defined here. Select the desired frequency from the drop-down
Select one of the predefined schedules, or Personalized to configure a more complex schedule:
Every X hour(s): This option allows scheduling backups on an hourly basis. You can enter a value
between 1 and 24.
Starting at: Sets the time at which the first hourly backup will begin.
Every X day(s) at x: This option allows programming backups on a daily basis. Enter 1 if you want to
perform a daily backup. When this option is selected, you must enter the time when the backup
should start.
Every X week(s) day at x: This option allows programming backups on a weekly basis. Enter 1 if you
want to perform a weekly backup. When this option is selected, you must enter the day(s) of the
week and the time when the backup should start. You can select several days of the week, if
desired. For example, you can use this option to set two weekly backups: one on Wednesday and
one on Friday.
Every X month(s), Xth Day at x: This option allows programming backups on a monthly basis. Enter
1 if you want to perform a monthly backup. When this option is selected, you must indicate which
day of the month and the time when the backup should start.
The Configuration page provides details about the content and destination for the backup:
Content: Select both the Data File and Structure File check boxes to ensure that both are backed
up. There are no User Structure files in use by Freezerworks, so leave this unchecked.
Attachments: If you want to include other folders or files outside of Freezerworks in your backup,
you can select and include them here.
If you click the Add file button, a standard Open File dialog box appears. When you select a file and
click Open, the file is added as an attachment. To include additional folders in your backup, click
Add Folder, locate the folder using the dialog box, and click OK. Use the Delete button to remove a
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file from the list. Clicking this button will not delete the file from the disk; it will only ensure that
the file is not backed up.
Backup File Destination Folder: Use the <…> button to select a location for the backup files. By
default, Freezerworks Server stores these files next to the database data file. It is strongly advised
to set a location on another disk volume to reduce the risk of data loss in case of disk failure on the
drive containing the database. The Used Space and Free Space numbers are updated automatically
and indicate the remaining disk space on the disk of the selected folder. Make sure that the free
space is sufficient for all of your backups. If a backup fails due to a lack of disk space, an error is
Backup file names
Freezerworks Server names backup files using a specific naming system on which the automatic
restore functions are based. This naming system cannot be changed.
Standard backups are named Databasename[xxxx].4BK, where databasename is the name of the
database data file and xxxx is the number of the backup. For example, the 26th backup of the
Freezerworks Server database is named FreezerworksUL6x[0026].4BK. If the backup is segmented,
Freezerworks adds the segment number as -xxxx. For example, the 3rd segment of the 26th backup
of the Freezerworks Server database is named FreezerworksUL6x [0026-0003].4BK.
Backups of log files are named Logname[xxxx].4BL, where logname is the name of the log file of the
database and xxxx is the number of the backup (starting at 0). For example, the 13th backup of the
log file is named Log[0012].4BL. If the backup of the log file is segmented, Freezerworks Server
adds the segment number as -xxxx. For example, the 2nd segment of the 13th backup of the log
file Log is named Log[0012-0002].4BL.
Log Management: A log file tracks all changes made to a data file since the last backup. It’s a good
idea to include a log file so that if you need to restore the previous backup, you can also restore all
changes made since that backup.
To create a log file
1. Do a backup of your data file without a log file.
2. Select the Use Log File check box (see graphic above).
At the Open dialog box, locate the Database folder for Freezerworks (it should be the default
4. Freezerworks will locate the data file and give the log file the same name, with a .journal extension
(e.g., FreezerworksUL60.journal).
5. Click Save. You will see the path and name of the log file in the Log Management window.
Where should the log file reside?
This is a good question. To protect it from hard disk crashes, it may be a good idea to have it reside on a
separate drive. But we have seen this adversely affect performance, as the program will be constantly
writing data to a separate drive. It may be best, therefore, to keep the log file in the same location as the
data file, and do more frequent backups.
The Backup and Restore page offers additional backup configuration settings.
General settings:
Keep only the last X backup files: This parameter allows activating and configuring the mechanism
used to delete the oldest backup files. It lets you save a specific number of backup files on the
disk—the oldest file is then deleted at each new backup—and thus avoids the risk of saturating the
disk drive. This feature works as follows: Once the current backup is complete, Freezerworks Server
deletes the oldest archive if it is found in the same location as the archive to back up and has the
same root name (you can request that the oldest archive be deleted before the backup in order to
save space). Based on the space on the disk that you set aside for your backups, you can determine
the maximum possible number of backup sets using the following equation:
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You must reduce the maximum number of sets by 1 because FreezerworksUL6x, by default, first
performs the current backup, then deletes the oldest archive from the disk. By default, the
mechanism for deleting sets is enabled and FreezerworksUL6x keeps 3 backup sets. To disable the
mechanism, simply clear the check box.
Backup only if the data file has been modified: When this option is selected, Freezerworks starts
scheduled backups only if data has been added, changed, or deleted in the database since the last
backup. If not, the scheduled backup is cancelled and carried over until the next scheduled backup.
No error is generated; however the backup journal notes that the backup has been postponed. This
option also allows saving machine time for the backup of databases mainly used for viewing
purposes. Please note that enabling this option does not take into account any modifications made
to the structure file or attached files.
Delete oldest backup file before/after backup: This option is only used if the Keep only the last X
backup files option is selected. It allows you to specify whether Freezerworks should start by
deleting the oldest archive before starting the backup (the before option) or if the deletion should
occur once the backup is completed (the after option). In order for this mechanism to work, the
oldest archive must not have been renamed or moved. The before option allows you to save space.
It is not necessary to reduce the number of backups allowed by 1, which lets you, for example, store
two 2-GB archives on a 5-GB disk. Please also note that in cases of interruption during a backup, you
can access neither the old backup (since it was previously deleted), nor the current backup, which
is not yet completed. Since the database could not be modified during the backup, you can be sure
that your data file is intact, even if you do not have a valid backup. Once the system restarts and
the incomplete archive is destroyed, proceed immediately with a new backup. The after option is an
additional security measure but requires more space on the backup hard disk.
If backup fails: This option allows defining of the mechanism used to handle failed backups (backup
When a backup cannot be performed, Freezerworks Server will make a new attempt. Three options
are available:
Retry at the next scheduled date and time: This option only makes sense when working
with scheduled automatic backups. It cancels the failed backup and an error is generated.
Retry after X Hour(s), Minute(s), or Seconds: When this option is selected, a new backup
attempt is executed after the wait period. This mechanism allows anticipating certain
circumstances that block the backup. You can set a wait period in hours, minutes, or
seconds using the corresponding options. If the new attempt also fails, an error is
generated and the failure is noted in the status area of the last backup and in the backup
journal file.
Cancel the operation after X attempts: If backups cannot be performed for some reason,
you can set the number of attempts to try before ending the operation here.
This area allows setting archive generation options. These options apply to main backup files and to log file
backup files.
Segment Size (MB): Freezerworks Server allows you to segment archives, which is to cut an archive
up into smaller sizes. This behavior allows you, for example, to store a backup on several different
disks (CDs, ZIPs, etc.). During a restore process, Freezerworks Server will automatically fuse the
segments. Each segment is called FreezerworksUL6x[xxxx-yyyy].4BK, where xxxx is the backup
number and yyyy is the segment number. For example, the three segments of the sixth
Freezerworks Server database backup will be called FreezerworksUL6x [0006-0001].4BK,
FreezerworksUL6x [0006-0002].4BK and FreezerworksUL6x [0006-0003].4BK. The Segment Size
(Mb) option is a combo box that allows you to set the size in MB for each segment of the backup.
You can choose one of the preset sizes or enter a specific size between 0 and 2048. If you enter 0,
no segmentation occurs (this is the equivalent of selecting None).
Compression Rate: Freezerworks Server compresses backups to help save disk space. However, the
file compression phase can noticeably slow down backups when dealing with large volumes of
data. The Compression Rate option allows you to adjust file compression:
o None: No file compression is applied. The backup is faster but the archive files are
considerably larger.
o Fast (default): This option is a compromise between backup speed and archive size.
o Compact: The maximum compression rate is applied to archives. The archive files take up
the least amount of space possible on the disk, but the backup is noticeably slowed.
Interlacing Rate: Interlacing consists of storing data in non-adjacent sectors in order to speed up their
read time. However, the storage phase is slower.
Redundancy Rate: Redundancy allows securing data present in a file by repeating the same
information several times. The higher the redundancy rate, the better the file security; however,
storage is slow and the file size is large.
Automatic Restore
The built-in Freezerworks backup module allows you to restore entire sets of database data in case of any
incidents, regardless of the cause of the incident. This incident can occur because of defective sectors on
the disk containing the database, a virus, manipulation error, etc. The last backup must be restored and
then the current log file must be integrated. To find out if a database was damaged following an incident,
simply re-launch the database. The program performs a self-check and details the necessary restore
operations to perform. In automatic mode, these operations are performed directly without any
intervention on the part of the user. If a regular backup strategy was put into place, the Freezerworks
restore tools will allow you to recover (in most cases) the database in the exact state it was in before the
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Freezerworks Server will automatically launch the database restore procedures after an incident. Two
types of automatic features are used: Automatic restore and Automatic log file integration.
Restore last backup if database is damaged: When this option is selected, the program
automatically starts the restore of the data file of the last valid backup of the database if an anomaly
is detected during database launch. No intervention is required on the part of the user; the
operation is logged in the backup journal. The steps of the automatic restore are as follows:
1. Freezerworks Server renames the damaged file.
2. Freezerworks Server extracts the data file of the last backup and stores it in place of the
previous one.
Integrate last log file if database is incomplete: When this option is selected, the program
automatically integrates the log file when a restored database is opened. No intervention on the
part of the user is required.
o When opening a database: The current log file is automatically integrated if Freezerworks
Server detects that the operations stored in the log file are not present in the data. This
situation occurs, for example, when a power outage occurs when there are operations in
the data cache that have not yet been written to the log.
o When restoring a database: If the current log file or backup log file having the same
number as the backup file is stored in the same folder, Freezerworks Server examines its
contents. If it contains operations not found in the data file, the program automatically
integrates it.
This page lets you set the Freezerworks Server client connection parameters. Most settings should be left as
shipped. There are two tabs: Network options and IP configuration. The Network options tab requires
little configuration:
Only the following items may be changed:
Port Number: This assigns the port number used for Client-Server communication. Default is
19813. If you are running two copies of Freezerworks Server on the same server, assign a different
port number for each.
There are three default port numbers in Freezerworks 6:
o SQL Server: 19812
o Application Server: 19813
o Web Server: 19814
The ports for the SQL Server and Application Server must be open in firewalls for Freezerworks to
function properly. The port for the Web Server must be open if the SOAP module is installed.
Encrypt Client/Server Connections: This allows you to activate or disable Freezerworks 6 Server
connection encryption. Its use allows you to reinforce communication security but it will slow down
connections. This option does not require any additional settings. By default, this option is not
At the network level, the SSL protocol is inserted between the TCP/IP layer (low level) and the high
level protocol.
To use SSL in classic client/server architecture, make sure that the file 4DSLI.DLL is properly
installed on the Freezerworks Server computer as well as on every Freezerworks Client machine.
This is the Secured Layer Interface dedicated to the SSL management. It should be placed in the
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main folder of the Freezerworks Server that publishes the database, as well as the main folder of the
FreezerworksUL6 Client. This file is usually installed by default
On the other hand, the encryption of 4D Server connections is not activated by default. You should
activate this mode:
Open the Client-Server/Network options page of the Database settings dialog box and
select the option Encrypt Client/Server Connections in the Encryption area
Do not change any of the other settings on this page.
The IP configuration page provides options for preventing connection to Freezerworks Server from
specified IP addresses.
The database administrator can choose which computers will be allowed to connect to the server. If there
are no entries, the server will allow any Freezerworks Server Client to connect to the server if the correct
user name and password are used.
The behavior of the configuration table is as follows:
The first column indicates whether to Allow or Deny access to Freezerworks Server from the IP address in
the second column. To add a rule, click the
button located under the list box. A new row appears in
the table. The
button lets you remove the current row. To change Allow to Deny or vice versa, select
from the drop-down list. The second column holds the IP address(es) affected by the rule. To specify an
address, click in the column and wait for the cursor to enter the column (there will be a short delay). Enter
the address in the following form:
You can use an * (asterisk) character to specify “starts with”-type addresses. For example, 192.168.*
indicates all addresses starting with 192.168.
The application of rules is based on the display order of the table. If two rules are contradictory, priority is
given to the rule located highest in the table.
You can re-order rows by modifying the current sort (click the header of the column to alternate the
direction of the sort). You can also move rows using drag and drop.
For security reasons, only addresses that actually match a rule will be allowed to connect. In other words, if
the table only contains one or more Deny rules, all addresses will be refused because none will match at
least one rule. If you want to deny only certain addresses (and allow others), add an Allow * rule at the end
of the table.
For example:
Deny 192.168.* (deny all addresses beginning with 192.168)
Allow * (but allow all other addresses)
By default, no connection restrictions are applied by 4D Server: the first row of the table contains the Allow
label and the * (all addresses) character.
The SQL page should ONLY be used to change the TCP Port for the SQL Server, if more than one copy of
Freezerworks Server is installed on the same computer. No other settings should be modified.
Using Freezerworks Unlimited Client
When you start Freezerworks Unlimited Client, it should locate Freezerworks Server on your network and
load the program. If there are any problems locating the server, you may see the following message:
Click Continue. The following dialog will appear:
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This dialog can also be accessed by double clicking the Freezerworks Client icon and then holding down the
Alt key until the box appears.
Recent tab
The Recent page memorizes the recent connections to Freezerworks servers. The list is sorted by
alphabetical order. To connect to a server from this list, double-click its name or select it and click the OK
To remove a server from the list, select it and press the Del or Backspace key.
Every server memorized is stored in a favorites file. On the Mac, the file is named FreezerworksUL6
(Library|Application Support|4D|Favorites). In Windows XP, the file is named FreezerworksUL6.pth
(C:\Documents and Settings\username\Application Data\4D\Favorites). In Windows 7 it is 4D Recent
Databases.XML (C:\Users\All Users\4D).
Available tab
Freezerworks Server includes a built-in TCP/IP broadcasting system that publishes the name of the server
databases over the network. These names are listed on the Available page.
To connect to a server from this list, double-click its name or select it and click the OK button.
Note: A caret (^) is placed before the name of the databases published with the encryption option.
Custom tab
The Custom page allows assigning a published server on the network using its IP address and attributing it
a customized name.
You can customize the Freezerworks Server TCP/IP broadcasting system so that the names of server
databases are not automatically published over the network. In this case, the names do not appear in the
TCP/IP page on the client side. However, if you know the IP address of a server database whose name is
not broadcast, you can manually enter its IP address.
Database Name: Allows defining the name of the Freezerworks Unlimited Server database. This
name will be used in the Recent page when referring to the database (only enter a “^” in front of
the database name if you are using encryption).
Network Address: Allows entering the IP address of the computer where the Freezerworks Server
was launched. If two servers are executed simultaneously on the same computer, the IP address
must be followed by a colon and port number, for example:
By default, the publishing port of a Freezerworks Server is 19813. If the Application Server port
number was modified in the Freezerworks Server, then the new value must be added as in the
Network Address example above.
Note: If the database is published using the encryption option, you must add a caret (^) before the
name, or the connection will be refused.
Tip: Interact with the Freezerworks Desktop
Although Microsoft has limited access that services have to the desktop, they have left a service named
"Interactive Services Detection" which fills similar needs. This service is disabled by default on most
operating systems.
Here is Microsoft's description of the "Interactive Services Detection" service:
Enables user notification of user input for interactive services, which enables access to dialogs
created by interactive services when they appear. If this service is stopped, notifications of new
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interactive service dialogs will no longer function and there may no longer be access to interactive
service dialogs. If this service is disabled, both notifications of and access to new interactive service
dialogs will no longer function.
The "Interactive Services Detection" service is disabled by default on most operating systems but can be
turned on, which then allows the Freezerworks service to interact with the desktop.
1. Stop the Freezerworks service if it is running.
2. Edit the Freezerworks service, and make sure Interact with Desktop is enabled within the
Freezerworks service's Log On tab.
3. Start the Interactive Services Detection Service.
4. Start the Freezerworks service.
5. Click View the message in the Interactive Services Detection dialog. Freezerworks will display only
the File, Edit, Window, and Help menus.
6. Select Window - Administration to see the Freezerworks Server's user interface.
7. When done, simply click Return now to return to the regular desktop session.
Troubleshooting Problems with the Client/Server Connection
Firewall Security
When you install Freezerworks Server, you may see a security alert similar to this:
It will be necessary to permit broadcast connections in order for your clients to locate the Server, or allow
manual access (see Custom Tab in the Using Freezerworks Client section). If you block connections to this
program, you will not be able to access the Server.
If the Client is not making a connection to the Server
Error –10001, Error –10002, or Can’t open database FreezerworksUL6 Server.
Verify that Freezerworks Server is installed and loaded only once on the server. Generally, client/server
connection problems do not occur when the systems are on the same subnet. However, to be certain, the
server’s IP address may be added directly to the Connection to Freezerworks6 Server settings on the client.
Click the Custom tab and enter a name and the server’s TCP/IP address, and then click OK. It also might be
necessary to enter Freezerworks Server’s port number. Add the port number by placing a colon and the
port number, without any spaces, after the IP address (e.g., NNN.NNN.NNN.NNN:19813).
Ping the server by typing the command “ping IP address” at the DOS command prompt, where “IP address”
is the server’s IP address. If the ping is not successful, contact your IT support staff for assistance.
If the client and the server are not on the same subnet, then the server must have a static IP address. This
address must be entered directly on the client workstations by following the directions above. If entering
the server’s IP address does not solve the problem, it also might be necessary to enter Freezerworks
Server’s port number. Add the port number by placing a colon and the port number, without any spaces,
after the IP address (e.g., NNN.NNN.NNN.NNN:19813).
After resolving the errors as described above, other errors such as Error -1 or GenGetUDFPointerToField
can also indicate client-server connection issues.
Clicking OK in this dialog opens the program and it looks as it usually does, however it runs slowly. When
entering data, several error messages similar to the following will appear when moving through the data
entry fields.
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This issue is usually resolved by opening ports 19812, 19813, and 19814 in the firewall.
Depending upon the firewall’s configuration, specific Freezerworks Client computers’ IP addresses might
need to be allowed through the firewall as well.
Windows Reconnect Message
If the Client/Server connection seems slow
See the section above on configuring the cache.
Freezerworks does not start. It flashes, and then disappears.
Data Execution Prevention (DEP) is a security feature in Windows. When starting Freezerworks for the first
time after installation, you may notice that the program flashes on the screen and then quits. This is an
indication that you may need to add it as an allowed program in DEP.
To add Freezerworks to DEP
1. Click Start, right-click Computer, and then click Properties, or use Start-Run and type
sysdm.cpl, and then click OK.
2. In Windows 7 or Windows Server 2008, select System Protection and then the Advanced tab. In
Windows XP, select the Advanced tab.
3. In the Performance section, click Settings.
4. Click the Data Execution Prevention tab.
5. Select the Turn on DEP for all programs and services except those I elect radio button.
6. Click the Add button.
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7. Browse to the folder where Freezerworks is installed, and select the executable file
8. Click Open, and click OK twice.
9. Restart the computer for this change to take effect.
10. Start Freezerworks.
A missing program file can also cause Freezerworks to flash and disappear. Make sure the
FreezerworksUL6x.4dc file is located in the Server Database folder.
Error Messages
An attempt has been made to save non-unique data to a table with a unique field.
This indicates a potentially serious error. Normally, it indicates Freezerworks for some reason wants to
assign a record with a number that has already been assigned to another record. In order to prevent the
data corruption that would occur, the program prevents this, and hence the error message appears. Contact
Freezerworks Support immediately if this error occurs.
An interruption has occurred while flushing the data to disk.
This indicates a serious problem with the data file. The fix most likely will be to run the Verify diagnostic
tool on the Maintenance page described above. Contact Freezerworks Support immediately if this error
Error 1.
See Error -9939.
Error 9939. External routine not found. The plug-in method cannot be executed.
A plug-in used to run a Freezerworks option is missing. Freezerworks is still accessible, but the option
controlled by the plug-in will not work. Contact Freezerworks support to get a copy of the missing plug-in.
This can also be caused by a missing DLL file, specifically msvcr70.dll. If this file is not available on your
operating system, contact Freezerworks support to get a copy.
“Out of Memory” or “Label Printer not Responding” error when printing bar code labels.
This occurs when the printer manufacturer's Windows driver has been installed. Freezerworks does not use
the Windows printer driver, therefore, a conflict exists between Windows and Freezerworks. The problem
is resolved by removing the printer driver, and disabling and re-enabling the COM port used by the printer.
Another option is to use the Add a Printer wizard in Windows, select the Generic Text Windows driver, and
enable the Shared Printer option. See the Label Printer Guide for instructions.
When the “Out of Memory” error occurs, it is important to note that data entered immediately before the
error may be lost. The most recently entered data resides in cache (temporary) memory, and shortly later is
written to the hard drive; data can be lost during this brief interval.
Other things to check:
Make sure the printer is on. Is the green button lit?
Does the printer advance one label when pressing the form feed button? If not, reset the printer’s
“gap” using instructions in the Dataworks Label Printer Guide.
Ensure that you have selected the correct COM port if the printer is directly connected to a
COM/serial port.
Is the printer attached to the computer using a serial-to-USB adapter? Use the adapter’s software
to determine the assigned COM port number.
When using a shared printer, make user the Shared Printer option is enabled in each user’s
account preferences.
The data file does not match the structure. Please call Dataworks!
Copy over a “clean” structure file to open this data file.
This indicates you are attempting to open a data file (*.4dd) with a structure file (*.4dc) that is matched to a
different data file. You will have to copy a “clean structure file” (a structure file not yet linked to any data
file) in order to open this data file. The clean structure file will then be linked to the data file. Make sure the
version number of the clean structure file you are copying over is of the same or a later version than the
one your data file was last opened with. You cannot open a data file with an earlier version. Contact
Freezerworks Support to receive a clean structure file, and be sure to back up your data file before opening
The mouse pointer turns into an icon with two tiny overlapping rectangles.
The two rectangles represent two windows out of order. A window behind the window you are currently
viewing must be closed. Press the Esc key on your keyboard to bring the hidden window forward.
Alternatively, you can minimize the front screen to access the screen behind it, and then close that screen
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and return to the screen you minimized, or use the Windows menu in Freezerworks to select the hidden
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