Paul,
Yes I am in touch with Sonokinetic. So far they have replied with:
"Have you tried doing an offline bounce with Grosso directly within Logic. If that works, its likely to be a connection setting between Logic and VePro."
I have replied to them with: "We can not run the libraries on our aging Mac. It is one of the older 'cheese grater' Macs. That is why we have them on a PC. I am hitting up VSL support on this as well. Paul usually gets back to me the same day. We'll see. :) We have two new Darth Vader Mac Pro machines arriving in a week so I won't be able to test the GROSSO on those machines until then. I have 48 gigs of RAM in my PC but am running dangerously close to maxing it out so a RAM bottle neck may be the issue as well. We are going to strip down the template to GROSSO only soon to test if RAM is the issue."
-th