I know the thread is old, but I started having this problem with every new gcode file I created after about March 10. All my pre-March files load into Mach-4 Hobby just fine. I use Fusion360 to make the g-code.
Does anyone know if something changed in Fusion360? If so, do I fix the problem by changing a setting in Fusion or in Mach4. My Mach4 version is about 2-3 years old.
Thanks for any help.