ok this is very strange. I tried loading some older gcode that had milled successfully, but I got the same error on each file. I uninstalled & reinstalled Mach 3. I can properly load the gcode before I press the reset button, but if I press the reset the code does not load properly. So to get this file to load properly, I have to zero the mill, then exit mach 3, fixture save, then restart & load the code.