When I open an *.nc file made with ArtCam, an entry in the Gcode listing right after the "%" simbol, starts with ":1448"...have to edit the code in order to run under Mach3. Is it a Mach3 or ArtCam problem?  After editing the code it runs fine without any apparent problem. Thanks for any clarification.

Sounds like the Post Processor in ArtCAM needs editing.
Hood

Hood, thanks for your reply. for postprocesor, I am using  a 4 axis listed in ArtCam,Axyz_Arc-INCH(*nc) dont see any 3 axis...maybe that could be the problem...not sure...

Afraid I have never used ArtCAM so cant say, maybe someone who uses it will jump in with the PP they use. If not then there might be a utility that comes with it so you can open and edit it to remove that line.

Hood