Fellow ChucKists, I have a ArrayOutOfBounds error and I'm quite sure that's one of my mistakes, not a ChucK one. This will require a bit of searching as I have rather a lot of arrays here and rather a lot of different things are done with them. Let's have a look at this; ArrayOutOfBounds: in shred[id=2:tr8or.ck], PC=[3565], index=[4] Ok, so it's a array that gets defined in my main shred and it's one that's 4 or less elements in size. That narrows it down considerably but we're not there yet. Now, I have the feeling that ChucK is trying to tell me something with the "PC=[3565]" but that bit is quite useless to me as I have no idea what it means. Questions; What does the PC bit mean? How is it useful? Can we consider ways of making it more useful? Yours, Kas.