Hello, sorry new to cnc  using Mach 3 trying to run g code program. Keep coming up with this status. How do I fix it so I can run program. Thanks for your help.

Can't possibly say unless we can see the code.

Reinstall Mach (keep your license and configuration files).

Can you jog the axes?  If so then Mach3 is probably working OK and you shouldn't need to re-install.

The G-code interpreter expects to see and recognise a limited range of characters, except in any comments section of a line (a "block" in g-code speak.  If you have any other character you would probably get an error like the one you see.  It could even be a non-printing character.  That's why I suggest you post the code so we can see if there is a problem.

If there isn't a spurious character then re-install.

John, I had that kind of problem, that's why I recommended installation of Mach3.
Ordinary ASCII G-code file got misinterpreted for unknown reason
Reinstall solved the problem.

Aha!