Roger:
If the errors your getting are "Radius not equal" or similar, then its
probably just the IJ mode. This can be toggled on the config/state screen in
Mach2.
Mach2 will run anything Master5 will, but it is more complex to set up
initially. Let me know the exact errors , or send me a troublesome file, and
I'll let you know how to proceed.
Thanks, Sorry for the trouble.
Art
www.artofcnc.ca