worked 
! thanks , in fact the problem came from the fact that I triggered the execution of the print string from the Event Begin play node and not from the OscOnReceived node, For the moment I’m not quite aware of the logic behind this behavior in the blueprint (as I thought the white links where neutral triggers, but seems not to be in this case) but i’ll read some more documentation about it !
Thanks again for you’re awesome plugin and help provided here 
!