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>Thanks Jess
>Your suggestion got me to the problem. The relation does not change but the form I use to define the filter uses combo boxes to display choices. One of these boxes displayes information from the file that the grid is related to. When I list this file it messes up the relation back at the grid. I found it by creating a test button that just puts a manual filter on the grid. This worked fine - so the problem had to be the filter form - and therefore the combo box. I will try a private data session for the filter form to fix it.
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>Thanks again
>
>Terry

Terry - sorry for jumping in here but I had a similar problem. I was looking up inventory records in a grid using a combo box and had the same sort of thing happen. I removed the relationship in the forms data environment ONLY(ie - not in the DBC) and it worked fine.