> I use a TwwDbGrid and a TIBOQuery.
> In the OnChange-event of Field1 I change the value of Field2 that
> is depending on Field1.
> The change of Field2 is not visible in the grid.
> So I use a call to InvalidateRows in the OnChange-event. Then the
> change of Field2 is instantly visible in the grid.
> But when I change Field1 a second time, without posting it first,
> an exception is raized.
> How do I solve this?

You eed to be more clear here.

At the very least let us know what exception was raised.

Also, I can't really tell what it is you are doing.

Jason