Other variations of the error include:

• "Status:  3 on C:\Sage\BWData\System\File.DDF"
• "The file is not open"

1. Reboot the effected workstation.
2. Close running tasks.
   • Have everyone exit Sage BusinessWorks
   • Press CTRL + ALT + DEL to open the Windows Task Manager
   • Go to the Processes tab and end any "TASKXXXX.exe," BWLauncher.exe, or BWServer.exe processes. Avoid ending Taskmgr.exe
3. Have all users log out and Disconnect stranded users.   
4. If the error continues, ask IT to prevent antivirus or backup software from scanning Sage BusinessWorks files.