> Thanks Helen, for a plenty of things for me to check.
>
> Yes, this is Superserver, but I see from firebird.log that FB server
> was shut down, restarted by guardian within 3 seconds and then
> some users started receiving this message while others haven't
> noticed the crash at all!
>
> Did he (fbserver) do it (shutdown) on his own will or OS killed him?
>
> Does it look like behaviour fixed in FB2? What exactly is fixed?
>

are you using UDFs in your application? if so are they your own? or some
other?
badly written UDFs have a habit of crashing the server
Alan