Hello, Josef!

JK> Is it possible that the access violation is caused by e.g. alignment
JK> issues? I tried to use a packed record without success, though.

do you know how to debug udfs? The same, as debugging dlls,
but here you run Firebird as application, i.e. specify
host app as
fbserver.exe
with the option
-a

and run it directly from IDE. I hope it will allow to debug
64bit code, at least, no problems with debugging 32bit code.

--
Dmitry Kuzmenko, www.ib-aid.com