MATLAB R2018a kernel does not start

[JuanOnOne]

Hi I'm having issues with my MATLAB R2018a starting in Jupyter.
No errors but executing commands in a cell never get executed.

I ran the install per the following link: https://www.mathworks.com/help/matlab/matlab_external/install-the-matlab-engine-for-python.html

These are the versions of my packages:
python == 3.6.8
matlab_kernel == 0.16.7
zeromq == 4.3.1
metakernel == 0.24.2
jupyter_core == 4.0

I've ran pip install -U matlab_kernel and skips all upgrades stating requirements are up to date.

Any help is appreciated, thank you.

[blink1073]

Hi @JuanInATrillion, what is the output of python -m matlab_kernel.check?

[JuanOnOne]

Hi @blink1073 thanks the help, its:
Matlab.kernel v0.16.7
Metakernel v.0.24.2
Python v 3.6.8

Connection to Matlab...
Matlab connection established
Matlab Kernel

[blink1073]

Does the following code work from within a python interactive session?

engine = matlab.engine.start_matlab()
engine.set(0., "defaultfigurepaperpositionmode", "manual", nargout=0)

[JuanOnOne]

Hi @blink1073 the above lines execute without issue.

[blink1073]

Hmm, it is hard for me to diagnose because I don't have a copy of Matlab myself. One other thing you could try is launching as jupyter notebook --debug and seeing what gets printed to the terminal when you run a cell with the Matlab kernel.

[JuanOnOne]

When I run a command using the MATLAB kernel. Here is my output, it's confusing because as demonstrated above I can call the MATLAB engine explicitly.

[blink1073]

Okay, it looks like it wasn't able to import matlab.engine here, which also prevented MatlabExecutionError from importing. That's why you got two errors.

Can you please run jupyter kernelspec list, and then paste here the results of that command as well as the contents of the kernel.json file in the matlab kernel folder?