>
>The question is, what takes precedance, if you have x function in Procedure file, in fll (dll) or as a stored procedure and how you can explicitly invoke the needed one.
>
>I believe, this is a case, which doesn't have a solution except for renaming...

I see. Thanks.
You can use wrapper SP with unique name in DBC and call it using selec statement.

* SP x()
...
* wrapper SP wx
PROCEDURE wx
RETURN x()
...
* Call
SELECT wx() FROM DUMMY  && dummy is the table with one filed and no records.

I didn't test with fll but it works with SET PROC TO in effect.