oops, yes, it caused a bad freeze here too...
and yes, the script ist meant for volumes, I haven't experimented much with ppp yet, I have to admit
I guess it crashed when trying to switch a non existant volume to surface mode.
there is another log.txt in your script folder, maybe there are more infos there, but probably not. (here, there where none except my own "print" instructions...)
here is a fixed version of the paint script, checking for the first volume's existance before continuing, here it avoids this crash...
Thanks for testing!
PaintHighLow.script.txt