>>Did this conversion program not try to use tables or DBC exclusive?
>
>No, I meant to mention that it occurs with NOUPDATE or SHARED in the USE for the table. I first coded NOUPDATE, then went to SHARED.
>I don't mention the .DBC, nor the word DATABASE in the code.

If you're running the other app in another instance of VFP, does the new instance SET EXCL OFF? I've been burned by that before..