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Hello,

I want to use the customconstraint of a tibctable.
For a field i have custmconstraint : r'' and i have a message in constrainterrormessage.
When the field is null my constrainterrormessage doesn't appear i have the message of fb which means that i can't have this field to value null.

How can i do to see my constrainterrormessage?

Thank you

Best Regards

Probably you should change your constraint to
r is not null

Hello Pash,

This is the same behavior with r is not null.

Regards

CustomConstraint property of TField is not supported by IBDAC.