At 01:50 PM 23/05/2005 +0000, you wrote:

> > Can't you set that in the design stage?
>I try set it in design now, still fire twice.
>
> > Are you changing it before or after the query was opened?
>Before opened.
>
> > I use ReadOnly in Builder for the Ident fields without seeing a
>problem myself.
>I try it on 2 different tables. It is a bit strange, but it doesn't work.

Try setting it as
MyDataset.FieldsReadOnly.Add('ID_VYKON=NOEDIT;NOINSERT');

instead of simply blanketing it as 'True'.

Helen