While no one has yet come up with a satisfactory answer, you might find an enlightening discussion of the problem (which appears to have to do with TRANSACTIONS) in Thread #236192...

>I have an interesting problem...it's not with a program that I've written, but with one by an external company...
>The problem is that when a user goes about entering records for a specific operation they corrupt the database header...
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>This problem surfaced when we received a new version of this program from that company, the old version, which never did this, was using VFP 5.0; the new version of the program is using VFP 6.0
>
>Does anyone have any clues as to what might be causing this?
>Again, this isn't my program, but the company is having a hard time explaining what might be wrong, so I've been asked if I can find anything out...and the first place I thought of was here...so put on your thinking caps all you smarties and ask any questions you need and lets see if we can't get this working;)
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>Thanks for any help you might be able to give : )