I just looked into the log file. There is no entry after the crash, but I found an entry of earlier chrashes with the same context and there is this entry in the logfile:
"fbserver.exe": terminated abnormally (4294967295)

I now did some debugging and found out, that the server only crashes, if I call the commit method of the transaction before running the report. When I change commit to commitretaining, it works well.

As described in my first post, it also works, when I create and free the database components dynamically.

In FB2.1 the same code worked well without server crash.

>
> First look into firebird.log
> may be there is some info about this
>
>
> Karol Bieniaszewski
>