I know this post is a bit old, but I'm trying to figure out the VSL environment in Logic X now and I can't get it to work. Any chance you could explain what the 'errors in the environment' were, and how you fixed them? Or could VSL update their multiport layer with a corrected version? the newest one I see is over 2 years old.
When I load a VEP instrument in Logic, I can access 16 channels on that one instrument. But there's no way to access the other 'multi-ports' of MIDI, and when I assign channels to them, they go nowhere.
????