Malheureusement, j’écris mieux en anglais! En particulier, quand on a besoin de parler des trucs techniques…

I have just checked some of my macros and I definitely have a copy of M6end.m1s which has a "setdatainput" command in it. Unfortunately, I have replaced the original Ethernet SmoothStepper in my CNC mill with a UC300ETH and changed from Mach3 to UCCNC at the same time so I cannot do any testing. Perhaps there is an issue with the .066 french version? I believe that this command is only implemented in .066 but perhaps the French version is not identical? I do not know if there is any chance that you could test using the English version?