Based on your further comments, it's unlikely that a data integrity problem is causing this file unit error. DataCare would not be able to fix an error of this sort; it's purpose is to find invalid characters in fields.

File Units represent data files and which user has access to them. For example, if someone is editing a customer, the file is locked, preventing anyone else from editing the same customer at the same time. If a problem occured while editing was taking place, the program may think a file is still in use when that's really not the case.

My next suggestion is to close the Accpac Plus WSM. Then rename the data file ezsemtab.zzz (where zzz is your data extension) in the directory where your TBR data is. When you next open TBR, this file will be recreated fresh. Are you able to complete the month end or does the File Unit error continue to occur?

Should the error still happen, this may be related to the version of Novell Client 32 you have on your machine. Novell Client has been known to give File Unit errors in Accpac Plus programs in certain circumstances, where another version allows the same functions to work successfully. Have you upgraded your machines or your network/client recently?

Regards,
Softrak Support