Have you had any luck in solving this?
'Pdf page' comes up in mappings when I try to assign the KL88 mod wheel to the attack in ES2.
The mod wheel then ceases to be recognised by MS, and the Screen control Inspector bumps me back to the first page ...
It seems to be the case whenever I try to control a specific parameter in the chosen software instrument, but not if its just a standard volume/expression etc command.
Cheers