OK it has to do with something in settings not "set. I don’t know which one but I had a red warning on settings and went in an tweaked stuff till it went away now I can generate G-code.
+Peter van der Walt I think it was the PWM max power setting that was 0.
Yes there was a red indicator on the settings tab…
It obvious to me now. Seems like when functions are inhibited by another parameter the error symbol or tool-tip should say so :).