>NO. This is code that has been converted from FP 2.6. It is has been working OK for years. The only other possibility is a conflict between FP 2.6 & VFP 6.0, since both the old and converted apps are adding (and editing) the data. But, they are both adding and editing data in several databases. Only one database is having this problem.
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>>>I am occasionally getting "Error # 108:File is in use by another user" when a user attempts to add a record to a database. The code that is generating the error is "APPEND BLANK". The code is in a VFP 6.0 SP 5 EXE. The user is running WinNT 4.0. The database is on an NT server. Has anybody seen this problem?
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>>>Thanks in advance.
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>>Are you using a record locking strategy or table buffering when adding records to the table?

I would issue an FLOCK() command on the table before the append blank and then an UNLOCK when you are done. You will have to have code in place for when the table cant get locked. This is just one method, but it may help to understand if that Table is truely being used and trap for it, so you can either wait some many seconds or abort the operation. But in a multi-user environment locking/buffering needs to be done.