> I think my version is too old, I dont have such interface or class.
> It is of 29/04/2003.

Maybe you should consider upgrading? :)

In case of old JayBird you have to specify something like:

TRANSACTION_READ_COMMITTED=isc_tpb_read_committed,isc_tpb_no_rec_version,isc
_tpb_write,isc_tpb_nowait

On the left side the JDBC transaction isolation level, on the right side -
list of TPB properties.

> Very kind of you... I don't understand where is my error. I think
> that I have no need in no_rec_version, but can't find anything else.
> The problem is described here
>
> http://www.sql.ru/forum/actualthread.aspx?tid=159687
>
> people are helping me...,

Vlad knows Firebird better than me, so you have chosen the better forum. You
can still try Firebird-Support, maybe Ann or Helen can help you (or try
epsylon.public.interbase for help from Dmitry Kouzmenko or Ded).

> my hope if you know about some bug of that
> old version.

We definitely do not set isc_dpb_no_garbage_collect by default. Therefore I
doubt that this can be the reason to your problem.

Roman