Hi, I just had this trivial syntax error, a missing quote (") character: if inbundle(b, "PTmeth) This was inside a function, and Gretl didn't seem to notice it when the function was defined. (Running the script without actually calling the function.) I wonder whether this is something that could be caught already at that stage, because I seem to remember that gretl does complain about unmatched parenthesis and stuff like that before executing the code. thanks, sven