> The standard UDF's works now fine. But still my self written UDF's, wich
> worked fine with Firebird 1.0, did not work. If I execute it, the Firebird
> server crashes (-1). I did not change the library. Is there in executing
> UDF's a difference between Version 1.0 and 1.5?

Previous versions were more forgiving when using wrong calling convention.
In FB1.5 you have to use cdecl calling convention for your UDFs.

Ivan