Ouch. So, you actually did something with CTRL, but Renoise doesn’t support the features of the CTRL plugin?
If that’s true, that’s a shame - and a bit strange, because the plugin would need to open an external MIDI port for communication (so, not internally-routed MIDI, which Renoise doesn’t have). And I have done several plugins for my own use, using the good old Synthedit. I could send and receive MIDI from the plugin to external gear, no problems. Sounds like CTRL could be improved in this aspect?