TypeError: argument of type 'NoneType' is not iterable

[michalisk13]

Hi scat community,

I have recently flashed my RPi CM4 with a new Rasbian and plugged in once more my SIMCOM modem as I did many times before.
Although this time I get this weird error I never got before:

scat -t qc -s /dev/ttyUSB2
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 322, in open
    self.fd = os.open(self.portstr, os.O_RDWR | os.O_NOCTTY | os.O_NONBLOCK)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
OSError: [Errno 16] Device or resource busy: '/dev/ttyUSB2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/scat", line 8, in <module>
    sys.exit(scat_main())
             ^^^^^^^^^^^
  File "/usr/local/lib/python3.11/dist-packages/scat/main.py", line 131, in scat_main
    io_device = scat.iodevices.SerialIO(args.serial, args.baudrate, not args.no_rts, not args.no_dsr)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/dist-packages/scat/iodevices/serialio.py", line 9, in __init__
    self.port = serial.Serial(port_name, baudrate=baudrate, timeout=0.5, rtscts=rts, dsrdtr=dsr)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/serial/serialutil.py", line 244, in __init__
    self.open()
  File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 325, in open
    raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 16] could not open port /dev/ttyUSB2: [Errno 16] Device or resource busy: '/dev/ttyUSB2'
user@finalmile0001:~/shark-rs $ sudo scat -t qc -s /dev/ttyUSB2
2025-02-25 15:20:18,265 scat.qualcommparser (stop_diag) INFO: Stopping diag
2025-02-25 15:20:19,767 scat.qualcommparser (init_diag) INFO: Initializing diag
Traceback (most recent call last):
  File "/usr/local/bin/scat", line 8, in <module>
    sys.exit(scat_main())
             ^^^^^^^^^^^
  File "/usr/local/lib/python3.11/dist-packages/scat/main.py", line 202, in scat_main
    current_parser.init_diag()
  File "/usr/local/lib/python3.11/dist-packages/scat/parsers/qualcomm/qualcommparser.py", line 196, in init_diag
    if 'id_range' in result:
       ^^^^^^^^^^^^^^^^^^^^
TypeError: argument of type 'NoneType' is not iterable

Please note that the exact hardware setup was working perfectly just before flashing a new OS on the RPi.

Any ideas?

I am not sure if this is related to issue #83

Thanks,
Mak