Thanks a lot for this clear answer. Sorry not to have found it. I did not pay attention to the format of the OSC messages:
/iannix/speed $1 (without space between /tags)

It seems that the « /setpos <target> <x> <y> <z> » message is not recognized. The center message looks quite similar but the position is not send out by IanniX.

I also noticed that IanniX control messages send by max through UDP seem not to be updated in the inspector, which should only be ok if you know perfectly all the controls, but difficult to understand if you are learning the software.

Best regards
Roland