>
> >
> > Woody, did you download the demo project I put up for you?
> >
>
> Will do it now, thanks. I'll let you know what I find...
>

Helen, you're demo works fine. However, I copied/pasted my TIB_Query
component from my project to yours and it does the same thing. Also, and
this might be an indication of the problem, in the OnCalculateField event, I
get an access violation when opening the form if I don't first test for
AField being assigned.

If Assigned(AField) then
if AField.FieldName = ... blah blah blah

Woody (TMW)