Find the arctype variable. Usually at the top of the post.
A post processor is a translator. It takes the generic NCI (Numerical Control Interface) file from Mastercam and converts it into a specific dialect of G-code (Fanuc, Haas, Siemens, Heidenhain, etc.). Out of the box, Mastercam includes hundreds of generic posts, but generic rarely means perfect. mastercam post processor editing
Mastercam post processor editing is not a skill you learn in a weekend. It is a journey of debugging, late-night breakthroughs, and the sheer joy of watching your first custom G-code run perfectly. Find the arctype variable