Has anyone come across G-code with line numbers? I purchased some G-code files from Ebay, designed for a Mach3 machine. The G-code has line numbers on every line beginning with N100. GRBL does not like something in the g-code, it seems to choke on just about every line with an error. I have no idea how to strip out the line numbers, the files are 2-8MB in size, manually editing them is not an option. Anyone?