I had that same problem this morning (with MIDI drums in BIAB2016). I ended up changing to a different MIDI style, selecting an RD, and it worked, then went back to the original style, selected an RD and it worked, so it appears to be somewhat intermittent. I didn't have automatic RD substitution on, but just tried to change the assigned MIDI drum track to a RealDrums track.


John

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