ImportError: Matlab Engine Not Installed

First, I have tried to use Livescript on good intentions.

Second, but Livescript does not have code folding capability.

Third, thus I want to try Matlab on Jupyter notebook on WIndows 10.

Fourth, I followed

https://www.mathworks.com/matlabcentral/answers/565661-install-the-python-engine-error-message?s_tid=prof_contriblnk

to install the python engine.

Fifth, I installed Python and Jupyter notebook.Jupyter notebook work with Python.

Sixth, I set up Matlab on Python

Seventh, I tried to import matlab engine on Python

>>> import matlab.engine
>>> eng = matlab.engine.start_matlab()
>>>

Eighth, I open "Matlab" from Jupyter

Ninth, then I tried to run 1+1 but it does not. It gives an error message of

[MetaKernelApp] ERROR | Exception in message handler:
Traceback (most recent call last):
  File "C:\Users\(..)\anaconda3\lib\site-packages\ipykernel\kernelbase.py", line 268, in dispatch_shell
    yield gen.maybe_future(handler(stream, idents, msg))
  File "C:\Users\(..)\anaconda3\lib\site-packages\tornado\gen.py", line 735, in run
    value = future.result()
  File "C:\Users\(..)\anaconda3\lib\site-packages\tornado\gen.py", line 209, in wrapper
    yielded = next(result)
  File "C:\Users\(..)\anaconda3\lib\site-packages\ipykernel\kernelbase.py", line 541, in execute_request
    user_expressions, allow_stdin,
  File "C:\Users\(..)\anaconda3\lib\site-packages\metakernel\_metakernel.py", line 395, in do_execute
    retval = self.do_execute_direct(code)
  File "C:\Users\(..)\anaconda3\lib\site-packages\matlab_kernel\kernel.py", line 101, in do_execute_direct
    retval = self._execute_sync(code)
  File "C:\Users\(..)\anaconda3\lib\site-packages\matlab_kernel\kernel.py", line 270, in _execute_sync
    self._matlab.eval(code, nargout=0, stdout=out, stderr=err)
  File "C:\Users\(..)\anaconda3\lib\site-packages\matlab_kernel\kernel.py", line 81, in _matlab
    """)
ImportError:
        Matlab engine not installed:
        See https://www.mathworks.com/help/matlab/matlab-engine-for-python.htm
        
        

Please advise the next step.

[Randall Janka]

I have the same issue. Can anyone help? TIA!

[leo Huang]

same issues here.

[Deepak Meena]

Hi , you seems to have done all the steps corretly . Only thing that I can think of is you might have two different python versions in your system. You might have integrated the matlab enigne with the wrong python version. Let me know if this is the case.

[YE ZHIXIAO]

@Deepak Meena Hi! Yes, I think it is this causation exactly. I encountered the same problem. So, may I ask what should I do to solve this problem "Matlab engine not installed"? I indeed installed it, but failed to start it in macos conda env or use it in jupyter. thanks for your time!

Answer 1

[Heidi M]

Hello. I had the same error, and I'm using Linux. I also prefer to use Pipenv. The problem was that matlab was not in my virtual environment. So, I copied the folder into the virtualenv using the following commands:

cd /usr/local/MATLAB/R2020b/extern/engines/python/build/lib
cp -r matlab ~/.local/share/virtualenvs/MY_VIRTUAL_ENV/lib/python3.6/site-packages/matlab

You can find MY_VIRTUAL_ENV by listing the virtualenvs in the ~/.local/share directory.

Previously, I edited my bash.rc to include the following line:

export PYTHONPATH="/usr/local/MATLAB/R2020b/extern/engines/python"

However, only first step mentioned above worked.

[Heidi M]

Sorry- I just realized you were using Windows. Maybe copying the referenced matlab folder into site-packages works? Hopefully this helps.