Arduino errors

Hello. I just joined this forum in the hope that someone can help me. I have constructed a 3 axis router which I expect to control via an Aduino UNO and G-CODE.
I have created 3D models which can be exported to STEP or STL format. I have struggled with the process of "translating" the information from the models to instructions to the router on how to carve the (wooden) shapes as designed.
I have created a toolpath and .nc file in Autodesk 360 (which judging by the price must be one of the best available).
When I try to verify the "sketch" in Arduino IDE, I get error messages.
such as: exit staus 1 and expected unqualified-id before '%' token
If any one is prepared to offer me advice, I would be most grateful.
Mike Moore.

If any one is prepared to offer me advice, I would be most grateful.

Without seeing the code the only advice I can give is for you to read this before posting a programming question and follow the advice it gives

Basically, no code, no advice

m1kem00re:
I have created a toolpath and .nc file in Autodesk 360 (which judging by the price must be one of the best available).
When I try to verify the "sketch" in Arduino IDE, I get error messages.

These two concepts are very separate.

A toolpath (presumably GCode) is not an Arduino program.

What Arduino program are you using to control your router? Many people use GRBL.

...R