1> Jumps ahead or backwards one line of gcode, Z> jumps ahead or backwards to the next z-axis move. What is the error message you are seeing exactly? I’m not familiar with that one
Add G90 code to the beginning of the file. Apparently some CAM programs don’t include a positioning gcode at the beginning. I corrected for the error previously, but there’s one spot in the code that I missed. It will be fixed in the next release, but in meantime, just edit the gcode and put that command at the beginning.
With every file until I put out a new release, but you may find G90 already there in many of your files. I don’t know which CAM programs dont specify the positioning mode (all the ones I’ve used have).