"No Module Named 'RGBMAtrix'"

[djlushious]

I'm getting the following error while trying to run the scoreboard server software. I've installed RPI-RGB-LED-MATRIX by itself and am able to produce images on my RGB LED screen. I've followed the instructions here on the GitHub, but this is beyond me. Any idea what may be going on and how to resolve this? Thanks!

[2024-11-15 10:33:26] [RGBME] [ERROR]:
Failed to load SixelAdapter for "sixel" display adapter!

If this is not your configured display adapter, the emulator will continue to load.

You can suppress this error in the `emulator_config.json` by adding:

  "suppress_adapter_load_errors": true

Traceback (most recent call last):
  File "/home/chicago/mlb-led-scoreboard/driver/__init__.py", line 32, in set_mode
    import rgbmatrix
ModuleNotFoundError: No module named 'rgbmatrix'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/chicago/mlb-led-scoreboard/venv/lib/python3.11/site-packages/RGBMatrixEmulator/adapters/__init__.py", line 51, in <module>
    package = importlib.import_module(package_path)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/chicago/mlb-led-scoreboard/venv/lib/python3.11/site-packages/RGBMatrixEmulator/adapters/sixel_adapter.py", line 5, in <module>
    import libsixel as sixel
  File "/home/chicago/mlb-led-scoreboard/venv/lib/python3.11/site-packages/libsixel/__init__.py", line 352, in <module>
    raise ImportError("libsixel not found.")
ImportError: libsixel not found.
ERROR (10:33:26): Untrapped error in main!
Traceback (most recent call last):
  File "/home/chicago/mlb-led-scoreboard/./main.py", line 169, in <module>
    main(matrix, config)
  File "/home/chicago/mlb-led-scoreboard/./main.py", line 41, in main
    config = Config(config_base, matrix.width, matrix.height)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 23, in __init__
    json = self.__get_config(filename_base)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 211, in __get_config
    custom_config = self.read_json(filename)
                    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 200, in read_json
    j = json.load(open(path))
        ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/__init__.py", line 293, in load
    return loads(fp.read(),
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
[2024-11-15 10:33:26] [RGBME] [INFO]: RGBME v0.11.6 - 64x32 Matrix | 1x1 Chain | 16px per LED (SQUARE) | BrowserAdapter
[2024-11-15 10:33:26] [RGBME] [INFO]: Starting server...
[2024-11-15 10:33:26] [RGBME] [INFO]: Server started and ready to accept requests on http://localhost:8888/`

[unwound29]

Looking at this:
ModuleNotFoundError: No module named 'rgbmatrix'

When you ran the install.sh, were there any errors? Looks like something failed in the section that installed the rbgmatrix submodule, lines 137-149.

[djlushious]

I did not receive any errors when running install.sh, and as a troubleshooting step I ran it a second time (using the instruction for upgrading the installation).

I can run install.sh again and link the output, if that will help. Otherwise, would it be best for me to start with a new PiOS install go from there?

[unwound29]

I'd try to run install.sh again and scan the output for any error -- I've had an error in a step before, but the whole script doesn't abort, just that step doesn't work properly.

On a fairly recent setup I made for a friend, cython was being called, but my rpi image(for Pi 2 Zero WH) didn't have cython installed and install.sh must not make sure you have it. There was an error during the install.sh run but I missed it because so much other stuff happened, and it seems to finish just fine.

To fix the cython issue I used this command:
sudo apt-get install cython3
to get that installed, ran install.sh again and all was well. Maybe you'll find something along the same lines?

[djlushious]

I did see an error about Cython3, so I followed your advice and installed Cython3 and then ran install.sh again. It installed, but now I'm getting the following error when I run main.py.

~/mlb-led-scoreboard $ sudo ./main.py --led-rows=32 --led-cols=64 --led-slowdown-gpio=4 --led-gpio-mapping=adafruit-hat
ERROR (08:14:31): Untrapped error in main!
Traceback (most recent call last):
  File "/home/chicago/mlb-led-scoreboard/./main.py", line 169, in <module>
    main(matrix, config)
  File "/home/chicago/mlb-led-scoreboard/./main.py", line 41, in main
    config = Config(config_base, matrix.width, matrix.height)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 23, in __init__
    json = self.__get_config(filename_base)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 211, in __get_config
    custom_config = self.read_json(filename)
                    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 200, in read_json
    j = json.load(open(path))
        ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/__init__.py", line 293, in load
    return loads(fp.read(),
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

If I run just main.py, with no arguments, I get the following return.

./main.py

=== snd_bcm2835: found that the Pi sound module is loaded. ===
Don't use the built-in sound of the Pi together with this lib; it is known to be
incompatible and cause trouble and hangs (you can still use external USB sound adapters).

See Troubleshooting section in README how to disable the sound module.
You can also run with --led-no-hardware-pulse to avoid the incompatibility,
but you will have more flicker.
Exiting; fix the above first or use --led-no-hardware-pulse

Running just "main.py --led-no-hardware-pulse NO_LED_HARDWARE_PULSE" takes me back to the original error above.

./main.py --led-no-hardware-pulse LED_NO_HARDWARE_PULSE
ERROR (08:21:03): Untrapped error in main!
Traceback (most recent call last):
  File "/home/chicago/mlb-led-scoreboard/./main.py", line 169, in <module>
    main(matrix, config)
  File "/home/chicago/mlb-led-scoreboard/./main.py", line 41, in main
    config = Config(config_base, matrix.width, matrix.height)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 23, in __init__
    json = self.__get_config(filename_base)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 211, in __get_config
    custom_config = self.read_json(filename)
                    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 200, in read_json
    j = json.load(open(path))
        ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/__init__.py", line 293, in load
    return loads(fp.read(),
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Thanks for the help!

[unwound29]

Try this instruction to stop that process from loading: https://www.instructables.com/Disable-the-Built-in-Sound-Card-of-Raspberry-Pi/

Otherwise my startup instruction looks like this:
sudo ./main.py --led-cols=64 --led-rows=32 --led-gpio-mapping="adafruit-hat"

The code in question that's crashing is this:

   try:
        config, _ = os.path.splitext(command_line_args.config)
        main(matrix, config)

so some kind of problem extracting the command line arguments. The only difference I see between one of your options and mine is the quotes around the adafruit-hat, maybe give that a run?

[djlushious]

I receive the following still.

~/mlb-led-scoreboard $ sudo ./main.py --led-rows=32 --led-cols=64 --led-slowdown-gpio=4 --led-gpio-mapping="adafruit-hat"
ERROR (14:33:22): Untrapped error in main!
Traceback (most recent call last):
  File "/home/chicago/mlb-led-scoreboard/./main.py", line 169, in <module>
    main(matrix, config)
  File "/home/chicago/mlb-led-scoreboard/./main.py", line 41, in main
    config = Config(config_base, matrix.width, matrix.height)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 23, in __init__
    json = self.__get_config(filename_base)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 211, in __get_config
    custom_config = self.read_json(filename)
                    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chicago/mlb-led-scoreboard/data/config/__init__.py", line 200, in read_json
    j = json.load(open(path))
        ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/__init__.py", line 293, in load
    return loads(fp.read(),
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[unwound29]

I think that JSONDecodeError is happening while trying to decode the config file. Is there maybe a value missing for a field?
As a test, if you rename/remove the config file and try to start it up, does that work? That could point to the config file having some kind of issue. Hopefully this is it for you!

[djlushious]

I restored the default JSON config file and I was able to start the scoreboard without issue. Thank you so much!

[unwound29]

Awesome!!