LBH, thank you for your reply, but I also tried with a Play List. But it's the same, the program-change is not effective. I confess I do not understand this change as the program-exchange works very well with the Mini V2 Modular V2, Arp 2600 V2, with short ones where there is no Play-List.
I added qu'Opusmodus acts as a sequencer, it sends its data via the Mac IAC ports or going through the ports of the Motu Midi Express 128. Thus, program changes are effective with the Arturia Origin or Yamaha EX5R.