>>Did you try to delete combo, test grid w/out it, then build combo from scratch and test again? At least you will know better where the problem lies.
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>Ed,
>
>Actually, after more testing, I've discovered that the problems exists over multiple forms and in any kind of lookup control. In fact, I have created a form with a tool bar, a drop-down combo, and a drop-down list, (and a database container with only one table in it). Both drop-downs create the error. It seems as if it might be data corruption, but I cannot isolate it.
>
>Thanks.
>
>David

The good way to isolate possible data corruption is :
1. COPY TO another table
2. Delete old table and rename new to use instead.
3. Recreate index tags from scratch for new table.