> The easier method is to use the V1.5x gbak utility to backup
> the V2.0 database through the V2.0 server. If you use the
> new V2 metadata features - base collation and collation
> attributes - you'll lose the data in them because V1.5
> doesn't know to ask about that. But you'll get a file that
> can be restored under V1.5.
>

Thanks, that will help! I do not use the new features of V2.0 - it was just
an test installation to check if the "cannot start transaction" error is in
firebird V2.0 too.

Henner