Thanks Dog and Pony, this show that this problem is targeting two different remote subsystems, the Eucon and the Midi remote ones.
As there is eventually a low probability that this will be corrected soon, i will change my mind and i will use keystroke emulation in combination with Midi interception to get the job done.
Using keystroke emulation i will fully bypass the faulty macro engine.
Efficiently interfacing a control surface is a difficult job as soon as you don't have a high end one !
And if you keep it with default functions then there are good chances that you'll have something that will not be really more useful than a mouse. Eventually you will end up using back the mouse for most jobs instead of the control surface... And you'll have lost a couple k$.
Buy Nuage or Nothing
Thanks for your help.