Thanks for the info. It's still a bit disconcerting that there's not much to be found as to how to prevent the problem though. If it happens again, I may take your advice and rebuild the form.

Chad

>PMFJI: I posted a question about two months ago on the same type of problem. I had an associate with dataenvironment swapping methods, and I had an optiongroup on a different screen form that kept getting trashed at about the same time. Both were flatfile forms, no pageframes, but had multiple tables in use for lookups, etc. The consensus at the time here (UT) was that the screen form table itself had become corrupted, and after rebuilding my screen from scratch I have had no further problems. Just packing it and/or appending from one scx to another used as tables was not good enough. For me it wasn't such a big deal at the time, as the forms were relatively simple, but if yours are really complex it could be a problem. Cut and paste between the 'bad' one and the 'good' one might make it less painful...
>
>HTH
>
>Rob