> I will try to write a test case, but the database crashes if the
> memory usage has grown to large. So I don't know if writing a
> testcase is usefull.

If this memory growth can be reproduced, I think that would help
developers to fix issue in the server.

> I already looked through all my code if the
> connections where closed properly and this is done. Is there some
> way to see how much connections there are with the database?

As far as I know, theoretical limit is 1024 connections, practical
limit is ~160-180 connections. There's some information on this topic
on JayBirdWiki.

> Message in firebird.log:
> Thu Jun 17 09:06:56 2004
> C:\Program Files\Firebird\Firebird_1_5\bin\fbserver.exe:
> terminated abnormally (4294967295)
>
> Is there more info that I could find somewhere on the system
> concerning this problem?

I doubt. I will try to post a message to firebird-devel list, but a
test case that reproduces memory growth would help. Probably there
are some workarounds for the problem.

Roman