G-code metrics config change

What happened?

This message appears when the G-code file tries to change the printer’s unit system. The printer shows the message: "G-code is trying to change metrics configuration. Allow the changes?".

This typically happens when switching between millimeters (G21) and inches (G20) inside the G-code. Our printers operate in millimeters by default.

Error name: G-code metrics config change

Error code: #31403 (CORE One) #17403 (XL) #26403 (MK4S) #13403 (MK4) #27403 (MK3.9S) #21403 (MK3.9) #28403 (MK3.5S) #23403 (MK3.5) #12403 (MINI)

How to fix it?

• If you are intentionally using a G-code that switches to inches, confirm the change when prompted.
• If unsure or if the warning appears unexpectedly, re-slice the model.
• Remove or modify unit-change commands if they are not needed.
• Ensure consistent unit settings across all software used in your workflow (e.g., CAD, PrusaSlicer).

It's generally recommended to use millimeters (G21) as the standard for 3D printing to avoid confusion or scaling issues.