BrainModular

Because MIDI Monitor on my Mac seems to think it's sending something invalid after each prog change message. (The same thing happens whether the message is created in my fastscript or with the built-in Create Midi Message module).

I will investigate more but if you use a midi virtual port ( here copperlan) this freeware apps don't give the same message..?
same in Bidule monitor via copperlan

Interesting!

This is good news as I was hoping this was just a glitch in the monitor program 'cos I'm performing live with Usine tomorrow night (first time using it out) and am thus triple checking everything for possible points of failure ahead of time.