>Thanks for your additional help. Tried BITMAP = OFF w/ no success, and don't use any @...,LIST, or ? commands. Was at vfp6sp3 and just upgraded to sp5. Recompiled the .exe and ran it w/ no problems. I had a very repeatable method to trigger the error, so I am quite confident that this solved it. However, I do have one helluva SQL statement complete w/ an embedded IIF that Mark McCasland helped me w/ a few years back. Since the error only triggered somewhere during the SQL generation/execution, the root cause must be as you suspected. Hopefully this will keep the problem away as modifying the SQL code would get ugly.
>Thanks

How about posting the problem for this SQL here again and may be we can come with a better idea for this SQL.

Though I guess Chris solution was the ticket.