Not creating g code

[Joe g]

Hi, when I create a g code, and run the post processor, load in to Mach3 ( on plasma) the screen on the right is empty and the code seems short... click start and nothing happens. What am I doing wrong? We have been using it for well over a year with no problems
Thanks in advance
Joe

[littlebritaly]

Your licence may be invalid.

If you havent paid for a licence, you will need to do so.

[djreiswig]

Do you have an operation with the correct layer selected?