Submitted by: @livius2

I do all by flamerobin

1. Create 2 databases - i use 16KB pages WIN1250 - but i suppose not the case
and connect only for first db

2.
then create external function to not existed dll on HDD

DECLARE EXTERNAL FUNCTION LICZ_XXX
integer
RETURNS integer BY VALUE
ENTRY_POINT 'LICZ_XXX'
MODULE_NAME 'XXX_UDF';

commit;

3. then try to create procedure with this udf

SET TERM ^ ;

CREATE PROCEDURE bbb
( ccc integer )
RETURNS
( ddd integer )
AS
BEGIN
ddd = LICZ_XXX(ccc);
suspend;
END^

SET TERM ; ^

try commit

*** IBPP::SQLException ***
Context: Transaction::Commit

SQL Message : -104
can't format message 13:896 -- message file C:\WINDOWS\system32\firebird.msg not found

Engine Code : 335544343
Engine Message :
invalid request BLR at offset 40
function LICZ_XXX is not defined
module name or entrypoint could not be found

4.
aboce is ok and now
rollback transaction;

5. try to connect to second db - FB crashes

VIRTUALXP-28174 Wed Aug 07 08:28:05 2013
Database: C:\DOCUMENTS AND SETTINGS\XPMUSER\PULPIT\KBSQLSTAT\DWA.FDB
Allocated 57516 page buffers of 65536 requested

VIRTUALXP-28174 Wed Aug 07 08:28:05 2013
Operating system call _beginthreadex failed. Error code 8

VIRTUALXP-28174 Wed Aug 07 08:28:05 2013
Database: C:\DOCUMENTS AND SETTINGS\XPMUSER\PULPIT\KBSQLSTAT\DWA.FDB
internal Firebird consistency check (cannot start cache writer thread)

VIRTUALXP-28174 Wed Aug 07 08:28:05 2013
"C:\Program Files\Firebird\Firebird_3_0\firebird.exe": terminated abnormally (4294967295)

VIRTUALXP-28174 Wed Aug 07 08:28:05 2013
Shutting down the server with 1 active connection(s) to 1 database(s), 0 active service(s)