Since you're not really as much as a code monkey as Rick, I wonder if rigging this up using reaction manager instead if that would be more friendly for you? Not exactly a tutorial tailored to your specific needs but it should give you the basics and get you moving in the right direction? It's the 3ds Max equivalent of…
Ok I spent a bit looking it over. Part of the problem is somehow the arm was unlinked from the clavicle. I changed the null object to a a bone object for the twist just in case. Not the same error now. But still is erroring. I was reading up on wiring in max 9 and noticed a mention of it being changed from older versions.…
The reaction manager isn't well documented outside of the Max help files which can be confusing, and that tutorial was the best I could find, but yes like Eric said it will watch any object, or property of an object and change any other object based on that data and the limits you set. If bone01 rotates 15degrees move and…