Warning "G21/G20 used but configuration specifies.."

This warning means that your configuration unit and the unit requested by the job file are different.

In most cases this is not intended, hence the warning.

Please note that the system values such as, but not limited to:

are not valid when interpreted as another unit and may result in unpredictable behavior.

It is strongly recommended to run job files in the same unit system as the unit that the machine is set up for.