Symbolic Toolbox Rendering Fails with MATLAB Kernel

[anishgoyal1108]

Summary

Version:

• jupyter_matlab_proxy: 0.15.2
• MATLAB: R2024a Update 6 (24.1.0.2689473)
• Python: 3.10.13
• Jupyter Lab: 4.3.0

Environment:

• OS: Arch Linux
• Browser: Firefox

Description:
The rendering of the symbolic toolbox fails when executing even the simplest symbolic expression. The expected output is not produced, and an error message is displayed instead.

Steps to Reproduce:

1. Launch Jupyter Lab.
2. Create a new MATLAB notebook.
3. Execute the following code:

   sym x
   x

Expected Behavior:
The expected behavior is that the symbolic variable x should be displayed without any errors.

Actual Behavior:
The following error message is displayed instead:

MATLAB Kernel Error:
Error using <a href="matlab:matlab.lang.internal.introspective.errorDocCallback('matlab.internal.cef.webwindow', '/opt/matlab/toolbox/matlab/cefclient/+matlab/+internal/+cef/webwindow.m', 403)" style="font-weight:bold">matlab.internal.cef.webwindow</a> (<a href="matlab: opentoline('/opt/matlab/toolbox/matlab/cefclient/+matlab/+internal/+cef/webwindow.m',403,0)">line 403</a>)
MATLABWindow application failed to launch. Unable to launch the MATLABWindow application. The exit code was: 1
Error in <a href="matlab:matlab.lang.internal.introspective.errorDocCallback('jupyter.execute>processSymbolic', '/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/jupyter_matlab_kernel/matlab/+jupyter/execute.m', 218)" style="font-weight:bold">jupyter.execute>processSymbolic</a> (<a href="matlab: opentoline('/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/jupyter_matlab_kernel/matlab/+jupyter/execute.m',218,0)">line 218</a>)
    webwindow = matlab.internal.cef.webwindow(connector.getUrl(url));
Error in <a href="matlab:matlab.lang.internal.introspective.errorDocCallback('jupyter.execute>processOutputs', '/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/jupyter_matlab_kernel/matlab/+jupyter/execute.m', 124)" style="font-weight:bold">jupyter.execute>processOutputs</a> (<a href="matlab: opentoline('/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/jupyter_matlab_kernel/matlab/+jupyter/execute.m',124,0)">line 124</a>)
            result{ii} = processSymbolic(outputData);
Error in <a href="matlab:matlab.lang.internal.introspective.errorDocCallback('jupyter.execute', '/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/jupyter_matlab_kernel/matlab/+jupyter/execute.m', 54)" style="font-weight:bold">jupyter.execute</a> (<a href="matlab: opentoline('/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/jupyter_matlab_kernel/matlab/+jupyter/execute.m',54,0)">line 54</a>)
result = processOutputs(resp.outputs);
Error in <a href="matlab:matlab.lang.internal.introspective.errorDocCallback('processJupyterKernelRequest', '/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/jupyter_matlab_kernel/matlab/processJupyterKernelRequest.m', 54)" style="font-weight:bold">processJupyterKernelRequest</a> (<a href="matlab: opentoline('/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/jupyter_matlab_kernel/matlab/processJupyterKernelRequest.m',54,0)">line 54</a>)
            output = jupyter.execute(code, kernelId);
Error in connector.internal.fevalMatlab
Error in connector.internal.fevalJSON

Additional Information:

• The issue seems to persist across different sessions and with various symbolic expressions.
• No modifications have been made to the MATLAB installation that could affect the symbolic toolbox.

Browser(s) used

Firefox

Issue found in

MATLAB Kernel

Script output

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                            MATLAB
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

matlab - /usr/local/bin/matlab OK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                       matlab-proxy-app
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

matlab-proxy-app - /home/anish/.pyenv/versions/3.10.13/bin/matlab-proxy-app OK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                           Jupyter
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

jupyter - /home/anish/.pyenv/versions/3.10.13/bin/jupyter OK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                  Python and pip executables
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

python - /home/anish/.pyenv/versions/3.10.13/bin/python OK

Python 3.10.13

pip - /home/anish/.pyenv/versions/3.10.13/bin/pip OK

pip 24.1.2 from /home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/pip (python 3.10)

python3 - /home/anish/.pyenv/versions/3.10.13/bin/python3 OK

Python 3.10.13

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                             Xvfb
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Xvfb - /usr/bin/Xvfb OK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                        OS information
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Linux
6.11.5-zen1-1-zen
Linux-6.11.5-zen1-1-zen-x86_64-with-glibc2.40
uname_result(system='Linux', node='archlinux', release='6.11.5-zen1-1-zen', version='#1 ZEN SMP PREEMPT_DYNAMIC Tue, 22 Oct 2024 18:31:33 +0000', machine='x86_64')


----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                      Conda information
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

conda - /opt/anaconda/condabin/conda

conda 24.9.2

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                      Installed packages
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

jupyter_ai                  2.26.0
jupyter_ai_magics           2.26.0
jupyter_client              8.6.0
jupyter_core                5.7.1
jupyter-events              0.10.0
jupyter-lsp                 2.2.5
jupyter-matlab-proxy        0.15.2
jupyter_server              2.14.2
jupyter_server_proxy        4.4.0
jupyter_server_terminals    0.5.3
jupyterlab                  4.3.0
jupyterlab_pygments         0.3.0
jupyterlab_server           2.27.3
matlab-proxy                0.23.1
notebook                    7.2.2
notebook_shim               0.2.4

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                  Jupyter server extensions
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Config dir: /home/anish/.jupyter

Config dir: /home/anish/.pyenv/versions/3.10.13/etc/jupyter
    jupyter_lsp enabled
    - Validating jupyter_lsp...
      jupyter_lsp 2.2.5 OK
    jupyter_server_proxy enabled
    - Validating jupyter_server_proxy...
      jupyter_server_proxy 4.4.0 OK
    jupyter_ai enabled
    - Validating jupyter_ai...
/home/anish/.pyenv/versions/3.10.13/lib/python3.10/importlib/__init__.py:126: LangChainDeprecationWarning: As of langchain-core 0.3.0, LangChain uses pydantic v2 internally. The langchain_core.pydantic_v1 module was a compatibility shim for pydantic v1, and should no longer be used. Please update the code to import from Pydantic directly.

For example, replace imports like: `from langchain_core.pydantic_v1 import BaseModel`
with: `from pydantic import BaseModel`
or the v1 compatibility namespace if you are working in a code base that has not been fully upgraded to pydantic 2 yet.         from pydantic.v1 import BaseModel

  return _bootstrap._gcd_import(name[level:], package, level)
/home/anish/.pyenv/versions/3.10.13/lib/python3.10/site-packages/pydantic/_internal/_config.py:341: UserWarning: Valid config keys have changed in V2:
* 'allow_population_by_field_name' has been renamed to 'populate_by_name'
  warnings.warn(message, UserWarning)
       X The `__modify_schema__` method is not supported in Pydantic v2. Use `__get_pydantic_json_schema__` instead in class `SecretStr`.

    For further information visit https://errors.pydantic.dev/2.9/u/custom-json-schema
    jupyter_server_terminals enabled
    - Validating jupyter_server_terminals...
      jupyter_server_terminals 0.5.3 OK
    jupyterlab enabled
    - Validating jupyterlab...
      jupyterlab 4.3.0 OK
    notebook enabled
    - Validating notebook...
      notebook 7.2.2 OK
    notebook_shim enabled
    - Validating notebook_shim...
      notebook_shim  OK

Config dir: /usr/local/etc/jupyter

JupyterLab v4.3.0
/home/anish/.pyenv/versions/3.10.13/share/jupyter/labextensions
        jupyter_matlab_labextension v1.0.0 enabled OK (python, jupyter_matlab_labextension)
        jupyterlab_pygments v0.3.0 enabled OK (python, jupyterlab_pygments)
        @jupyterhub/jupyter-server-proxy v4.4.0 enabled OK
        @jupyter-ai/core v2.26.0 enabled OK (python, jupyter_ai)
        @jupyter-notebook/lab-extension v7.2.2 enabled  X


   The following extensions may be outdated or specify dependencies that are incompatible with the current version of jupyterlab:
        @jupyter-notebook/lab-extension

   If you are a user, check if an update is available for these packages.
   If you are a developer, re-run with `--verbose` flag for more details.

[prabhakk-mw]

@rashedmyt , could you please investigate?