Klipper will never restart except for reboot.

[kingjamez]

After installing KTC, klipper never recovers from a restart. Instead I get this error in the logs:
File "/home/pi/klipper/klippy/extras/ktc_tool.py", line 351, in get_status
"toolchanger": self.toolchanger.name,
^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'name'

I must reboot the host, when I do everything works until something requires a restart of klipper (as happens many times when setting up a toolchanger), but it never will restart klipper, I have to manually reboot the RPi each time.

How can I diagnose?

[TypQxQ]

From the error message it seems that it is loading the modules in the wrong order when restarting only Klipper vs the whole system. I haven't seen this behaviour before.
/ Andrei

[kingjamez]

Appreciate the quick reply! It helped me narrow down how to troubleshoot. After a bunch of work it looks like it's the T0 CAN board (or possibly USB-CAN converter) that isn't surviving the Klipper restart, nothing to do with your code at all.

[TypQxQ]

Happy to hear 😄