OK, I am using the generic post out of Mastercam 9.1 and it appears that it is working correctly. The test Gcode routine that I drew works fine, so it appears that after some setting changes, such as the incorrect choice of setup units, namely mm. instead of inches caused a problem in the Gcode, I guess, because I changed over to the inches and recalibrated, and it ran flawlessly., So, I guess my problem is solved, thanks. Bob.