Ceiling clearance violation

What happened?

The Prusa CORE One and CORE One L are CoreXY printers with a chamber. In some particular G-codes, especially customized commands, an upward movement after a downward printer movement might be programmed, but this carries the risk of a collision between a printed model and the chamber ceiling. 

In that case, the printer shows the warning message "The printer queued a move that may crash the model into the ceiling" before printing. 

Error name: Ceiling clearance violation

Error code: #31112 (CORE One) #35112 (CORE One L)

How to fix it?

Before proceeding with printing the file, it is recommended that you double-check your printable file to ensure that no upward movements are programmed or expected after a downward print movement.