Barbara,

First off, thanks!

>>3. Both forms have Private Data Session, with Optimistic BufferMode.
>
>Using optimistic buffering doesn't tell us if you're using row buffering or table buffering. My guess is that you're using row buffering, but really you should have this table open in read-only mode. It sounds like you're not letting the user make changes to the Customer table from this form, so you definately should open it read-only with no buffering set at all.

Good point, but nowhere in the Invoice form did I put anything that would change the contents of the Customer table, so even if it's in Optimistic Row buffering should it matter? So why does a mere SEEK() on the Customer make an Update Conflict?

Sincerely
Dennis