Hi I had the same error... After fiddling around (thankfully I'm a developer) I changed the code like this in dogm_font_data_marlin.h //#include utility/u8g.h #include clib/u8g.h I removed the smaller /greater symbols because they're being deleted in this post. In the code you should keep these symbols there are 2 places that the .h file is referenced, In my case I just replaced the stepper dby StathisD - Delta Machines