Hi Paul,
I ordered another switch this morning so I'll give it a try.
Could it be that I have too many instances? In my setup, I use the stereo version of VEP 6. I use the stereo plugin because (and correct me if I'm wrong or if something has changed) the multi-output plugin requres forcing live mode with a disable I/O plugin which I've found to be much more taxing on my main computer's CPU. Not to mention that you lose the ability to control the volume of each instrument from the logic channel strip, and you have to do your effects processing in the logic pro mixer on the aux return channels of the multi-output instrument.
So, with my current setup, Spitfire 1st violins is loaded in one VEP instance, 2nd violins in another, Violas in another, and so on. So, I end up with probably 150 instances per computer for my whole template. Is that simply too much for the server mode to handle?
Also, I should say that when I said I was thinking about switching to MIDI and MADI, I didn't mean that I was thinking about giving up VEP 6...just the server function. VEP 6 is a great plugin host for sure.