Internal error in MCU 'mcu' stepcompress

Internal error in MCU ‘mcu’ stepcompress


An unforeseen issue in the stepcompress logic has happened.


  • This is an error that should not happen under normal operating conditions
  • Often this appears in the log as a consequential error of an error that occurred earlier

Potential solutions

  • Scroll upwards in the klippy.log from this error. If there is another error then this is likely the source of the issue and should be looked at
  • If there is no upstream error and it is reproducible then a developer should analyze it more in depth