Thanks Mac,

The MIDI interface is via USB. The connections have been cleaned just in case, but no difference.

It acts more like a software glitch rather than a HW issue unless the SD4 just picked this time to start flaking out.

For good measure I hooked the SD4 up to my notebook which still has 2013 on it. No problems there.

Switch back to the machine with BIAB and RB 2014 installed and the problem comes back.

Guess I'll need to talk with PG and see if they have any suggestions.

Burt