Hi,

> > Did you modify the NOT NULL flag with IBExpert?
>
> Yes - a few days ago I've done this operation, after creating table with
> NOT NULL option for field which now makes me this problem... Do you
> think it could be a reason?

I've heard of problems with IBExpert before - but not related to this.

Usually, changing a NOT NULL flag requires everyone to log out of
the database afterwards to take effect. Was there, by any chance, still
some connection opened?


With regards,

Martijn Tonies
InterBase Workbench - the developer tool for InterBase and Firebird
http://www.interbaseworkbench.com

Upscene Productions
http://www.upscene.com

"This is an object-oriented system.
If we change anything, the users object."