Which functions were you trying to give arguments?
Almost none of the built-in functions use arguments, every script should though.
LoadMidi was one of the ones I missed, if that's what you need, you can patch it as described in that linked topic.
I'll be finishing up the next build in a day or two if you want to wait, but it isn't hard to patch if you're careful.
Ahh, I see from a post reaction that you're probably interested in SpeedShift arguments. I see that there isn't actually a function named SpeedShift, thought there was, let me figure out what that's called.