Hello! I'm using the Mach3 demo to learn how to do G-codes.

I loaded 3 lines of G codes:
G0 X10 Y10
G4 P1
G0 X10

However, only the first 2 lines were successfully loaded. Why is the third line omitted?

Any help is appreciated, thank you!
  - Izzy

It's perhaps odd but you need a CR after the last line of Gcode.
A common method to ensure this is to place a % symbol as the last line of the Gcode file.

Tweakie.

Ah, this helps. Thanks a lot!