@hek Well that works better. I still get "There was an error compiling" from codebender on the Mysensors webpage, but now not as many sketches as before. It took going back to your video on loading the IDE and the gateway sketch. It is different than the way I learned Arduino, so that may have been part of the problem. I also found multiple copies of several of the files all associated with previous API versions some with the same file name which I am sure Arduino got confused. So with all the house keeping and reloading the IDE, the bottomline I can now get V1.5 gateway to compile.