Thanks again.

> Of course, you must use cdecl for all UDFs.

No problems then. I will fix the calling convention.

Just an aside for whoever needs to know, this doco needs fixing or
updating. It is one of the ones the original developer used as a
template.

http://www.firebirdsql.org/index.php?op=useful&id=geldenhuis

Most of the 100 other documents I have seen today use cdecl, but I
assumed stdcall must also be valid.

> But it may be not the
> only bug in your UDF. Show us it's source and you'll get more
> answers.

:)

Probably isn't. I want to do some work in Dunit before I trouble the
support list.

Thanks again

Adam