You would get better feedback if you included an example of the error. It does not have to be entire project, just enough of a patcher to demonstrate problem. Select what you want to be shared and examined, and chose "copy compressed" from file menu. Then paste compressed patcher into the forum post: we will unpack, examine and reply: without this input we are just guessing: there are many ways of performing work in Max/Msp, some efficient, several not so efficient... your issue *may* not be with the function object itself...kinda doubt that it is, but... without an example of your issue, we are blind. yrs trly J2K aka charlieb

Hi Charles,

There isn't an error to report, it's just incredibly slow....

So following your advice i stripped it back to just the elements, and lo and behold when i simplified it down it was lightning fast, it seems therefore that it's not the function object but my method of recalling the lists that's in question...

Off to experiment!

Cheers D

Beautiful....

I was trying to send all 8 functions the list at the same time, changing it to send them in order with a trigger list i i i i i i i i object and it's solved the problem!

Brilliant!

Cheers D

Congratulations... :) u wrawk!

Moral of the story might be: "correct execution order and flow are PARAMOUNT in Max/Msp......" or some such drivel, :). charlieb

Absolutely! Lesson definitely learnt, now to work through some old challenges again!

Cheers D