“Non-hexadecimal number found” error flashing Klipper to EBB36

I’m setting up my EBB36 toolhead board via the CANbus guide found [here](https://canbus.esoterical.online/toolhead_flashing#katapult-is-now-installed). Everything is working alright until the last step of flashing Klipper onto the toolhead board, where I’m getting an error that doesn’t seem to make sense. The flashing command is ```python3 ~/katapult/scripts/flashtool.py -i can0 -f ~/klipper/out/klipper.bin -u 17462ab17560``` I have double and triple checked that the UUID is correct and there’s no silly issues like having a space at the end. The error I get is ``` ERROR:root:Flash Tool Error Traceback (most recent call last): File "/home/biqu/katapult/scripts/flashtool.py", line 1057, in main sock = CanSocket(args) File "/home/biqu/katapult/scripts/flashtool.py", line 583, in __init__ self._search_canbus_bridge() File "/home/biqu/katapult/scripts/flashtool.py", line 758, in _search_canbus_bridge det_uuid = convert_usbsn_to_uuid(serial_no) File "/home/biqu/katapult/scripts/flashtool.py", line 203, in convert_usbsn_to_uuid chip_id = bytes.fromhex(serial_number) ValueError: non-hexadecimal number found in fromhex() arg at position 5 ``` I can’t find any examples of other people having this error across the internet, and I’m pretty stumped as to what the actual issue is. The character at position 5 of the UUID is “a” which last time I checked is definitely a valid hex character. Is anybody able to shed some light on why this might be happening? I’ve had a look through the flashtool script and I can see there’s a line that logs the value of serial_number ``` serial_no = usb_info["serial_number"] logging.info( f"Found Klipper USB-CAN bridge on {can_intf}, serial {serial_no}" ) ``` however I don’t know where this log is saved to and it doesn’t seem to be part of the live output in the terminal.