>. > > >> Did you try GetSchemaVersion? > >How ?? > >GetSchemaVersion -- this is YOUR schema version, right ? Right. > >Note, that b13 have change FORMAT OF DATABASE to 2.4. >So you cannot open by b11 db made or opened by 2.4 b13 > It is not backward compatible? How can I upgrade the format, then, so it is transparent to the user? The database must simply open... Jon