> No, no chance. A calculated Field ist allways readonly.
> (hardcoded in TIB_Statement.GetReadOnly(...) )
>
> I changed the code there, introduce a new constant as a FieldAttribute.
>
> I will email you the code changes, so that you can decide, if to put
> in the next release.
>
> Andreas Hesse

COMPUTED in the context of IBO is not the same CACULATED at the server.
COMPUTED means you can mess around with it on the client side
Alan