> I just had a problem now <g>, which there was no exception raised
> when required fields are not filled.

Run the IB_Monitor to see what is actually being posted. It may be
that you are posting blank string values (which is not the same as
null). You may need to apply the BLANKISNULL column attribute, or
write triggers on the table to also check for blanks.

--
Geoff Worboys - TeamIBO
Telesis Computing