Thank you! The problem is OK now.

--- In ib-support@yahoogroups.com, "Fabrice Aeschbacher"
<fabrice.aeschbacher@s...> wrote:

> Hi,
>
> You can try to use gbak to backup & restore the DB.
>
> If it does not work, try to reinstall Firebird 1.0, make a
> transportable backup (gbak -b -t), then reinstall Firebird 1.5 and
> restore.
>
> HTH,
> Fabrice Aeschbacher
>
> --- In ib-support@yahoogroups.com, "jwdongcn" <jwdongcn@y...> wrote:
> > Hello!
> > I upgrade to Firebird1.5 RC2 today.
> > I can connect to the old gdb file which is created under FB1.02
> > using "EMS Interbase & Firebird Manager 3".
> > But when I use select command, it return a error:
> >
> > Dynamic SQL Error
> > -SQL error code = -204
> > -Table unknow
> > -T_USER //It's one of my tables.
> >
> > But my application can run and retrieve information from the same
> > database.
> >
> > Why? and how to resolve it?