Hi. I am trying to route Opusmodus MIDI output to either an external synth via a MOTU MTP AV, or internally to NI Kontakt 5.

I have tried various different port settings in the Audition Preferences panel of Opusmodus, but no matter what port I select,

MIDI only goes to cable 1 of the MTP and nowhere else. It will not go to Kontakt even when the output name in Kontakt matches

the output name in Opusmodus.

I have verified that other sequencer programs on my machine  are routing MIDI correctly.

This is with a 2013 Mac Pro running OSX 10.9.5, and Opusmodus 1.0.15669.

Is this a known problem?

There are no known problems with Opusmodus MIDI routing.

First check you MIDI ports. Evaluate the function below:

(midi-destinations)

 The output of the function should looks something like this:

=> ((0 . "Bus 1") (1 . "Bus 2") (2 . "Bus 3")
    (3 . "Bus 4") (4 . "Session 1") (5 . "vPacarana"))

You can use one of the formats, a number or the string name.

Score example with port using a number:

(setf mat '((q a4 e a4 = q b4 trem-s)
            (e c5 trem-t s d5 trem-3s s e5 trem-x h a5 trem)
            (q a5 ff fermata)))

(def-score tremolo
    (:key-signature '(c maj)
     :time-signature '(3 4)
     :tempo 60)
  
  (inst
   :omn mat
   :port 0
   :channel 1
   :sound 'gm
   :program 'violin)
  )

Now, the same score but with port string name:

(setf mat '((q a4 e a4 = q b4 trem-s)
            (e c5 trem-t s d5 trem-3s s e5 trem-x h a5 trem)
            (q a5 ff fermata)))

(def-score tremolo
    (:key-signature '(c maj)
     :time-signature '(3 4)
     :tempo 60)
  
  (inst
   :omn mat
   :port "Bus 1"
   :channel 1
   :sound 'gm
   :program 'violin)
  )

The Port setup in Opusmodus Preferences is for Audition (snippets) only and not a general MIDI setup, Opusmodus recognize you MIDI setup automatically. 

The port number is 0-based, therefore you see number 0 for port 1.