Background
This error typically occurs when the host sends a message to the MCU, scheduling an event at a time that is in the past.
Reasons
- High system load of the host
- High disk activity of the host
- Swapping due to low free memory
- Disk errors / dying SD card
- Unstable voltage
- Other hardware hogging the USB bus or other system resources
- Running in a Virtual Machine
- USB, UART or CANBUS wiring faults leading to extremely delayed messages
- ElectroMagnetic Interference (EMI) affecting proper signal transmission or leading to high resend rates
Potential solutions
- Check for other resource-intensive processes running in parallel
- Remove additional hardware, especially web cams
- Check SD card for errors / replace SD card
- Check for
Under-voltage detected!errors / make sure to use a good and adequate power supply - Do not run data lines (USB, UART, CANBUS) close to and in parallel to high current lines like heaters or steppers. Use high quality cables (shielded / ferrite core). Keep such cables as short as possible
- Also see Advanced Trouble-Shooting / Graphing Klipper