At 02:53 AM 26/04/2012, nielsvanaert wrote:

>Hello,
>
>We have made C# (.NET) application that is using Firebird embedded V2.5.0
>We using ADO.NET as interface to the Firebird database.
>
>And sometimes at random times I get the follow exception FirebirdSql.Data.FirebirdClient.FbException: validation error for column *** unknown ***, value "*** null ***"
>
>I haven't any idea what this exceptions means!?!
>I've search on the internet for hours but I didn't find something about this specific exception.
>
>Please, can somebody give me any hint?

Well, it won't be random. It will occur whenever someone tries to enter data that breaks a CHECK constraint that you have on a domain or a column.

./heLen