Thanks! Indeed, it seems to be similar.
I have seen that bug report earlier but was not sure if has something
to do with my problem since the reported bug was on linux.

I've used FPC 2.6.2 to compile the udf, btw.

Am 13.06.2013, 09:04 Uhr, schrieb Frank <frank@...>:

> On 06/12/2013 11:56 AM, Vitali Voroth wrote:
>> Hi!
>>
>> I'm not sure if the following is a bug, so i try it here first before
>> posting it to
>> firebird-devel. Chances are that somebody on this list can help me.
>>
>> I am running the 64-bit version of Firebird 2.5.2 (26540) on Windows 7.
>> I noticed that the server crashes after using a udf compiled with
>> FreePascal,
>> letting the transaction open and idle for a few minutes and then exit
>> the client.
>
>
> Probably sth. similar to
>
> http://tracker.firebirdsql.org/browse/CORE-3651
>
> What version of Freepascal are you using to compile your UDF?
>
>
> Frank
>