I have MPE messages sent to Reaper where VCV is loaded. I am monitoring the PW values with ReaControlMIDI and all seems fine, except that the MPE mode in the MIDI-CV does not let these values through. If I switch to “Reuse” I get values but only for channel 1, i.e. not MPE I am sending these commands from Max but they are formatted as an MPE interface so that shouldn’t be the problem (not positive)
This is a known bug, we hope to have a fix for you shortly.
I have an enlistment and I can test MPE on Windows with a Haken Continuu Mini and a sensel Morph. Ping me if you need a hand.