I tried adding another command to the post processor, but it gives an error. I was trying to add

CodeProgramStop            "M0" .  I used this in my tool change routine . As a work around I changed -  CodeToolChange            "M6" to "M0" and that seems to work. Can program stop command be added , am I missing something ? Thanks

If you want to put a code in there to pause the program I would suggest making changes to the ToolChangeBlock down toward the bottom of the post, but if you are not going to be using automatic tool changing then changing the CodeToolChange to a pause command is fine too - just make sure you save the post as a new file rather than overwriting the existing one that comes with PixelCNC otherwise automatic updates will overwrite your modified post if it has the same name as the original post(s) that came with it.

The only variables that exist in the PixelCNC post processor system are the ones that you see defined in a post. There isn't a CodeProgramStop variable to define, but it's an idea to add one on there and have PixelCNC include stops where tools need to change per user G-code export options.

 - Charlie