Fail to start matlab engine in python 2022b
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I use MacBook Pro M1 chip with macOS13 and Python version is 3.9.13.
I installed the Matlab R2022b and followed the document to install engine API via pip with code :
python -m pip install matlabengine
However, when I call matlab engine, it is failed with the output
raise RuntimeError("Could not find directory: {0}".format(engine_dir))
RuntimeError: Could not find directory: /Applications/MATLAB_R2022b.app/extern/engines/python/dist/matlab/engine/maca64
I find the directory that I can only find maci64.
May I know how could I start matlab.engine in Python?
回答（7 个）
Jonathan Lilly
2022-10-30
1 个投票
I have the same issue. Perhaps an M1 chip issue?
Charles King
2022-12-1
1 个投票
I think it is a M1 chip issue because I have the following directory: /Applications/MATLAB_R2022b.app/extern/engines/python/dist/matlab/engine/maci64
and
/Applications/MATLAB_R2022b.app/extern/engines/python/dist/matlab/engine/maca64
is what the script is looking for.
Kannan
2022-9-28
Could you check the default install location of MATLAB? This can be done by going into the MATLAB Command Window and calling :
matlabroot
By default, you will find MATLAB installed at the following location
/Applications/MATLAB_R2022b.app
When MATLAB is not installed in the default location, the bin/architecture directory within the MATLAB root directory must be added to an environment variable. The path can be added to the environment variable within the shell startup configuration file:
# in .bashrc
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:<matlabroot>/bin/glnxa64
Could you try these steps to see if the error still persists?
6 个评论
Jiaxin Peng
2022-9-28
Brian Ross
2022-12-1
编辑：Brian Ross
2022-12-1
I too have MATLAB installed in the default location on my M1 machine. The only glnxa64 directory in the <matlabroot> directory is at /Applications/MATLAB_R2022b.app/help/includes/product/arch/glnxa64. I do not have a maca64 directory anywhere.
I take this to mean that there currently isn't any support in the matlabengine package for the Arm architecture.
Prabhjot Billing
2023-1-1
I have the same isse on M1. It seems matlabengine is not supported on M1/ARM?
Jiaxin Peng
2023-1-1
Jiaxin Peng
2023-1-1
编辑：Jiaxin Peng
2023-1-1
Loc
2023-6-7
I met exact issue as you. How could you overcome it?
Hajar
2023-1-9
My MATLAB runtime root is at /usr/local/MATLAB_Runtime/R2022b on a GUI-less server Ubuntu 20.04 installation, so I checked
echo $LD_LIBRARY_PATH
And got nothing (it's not set) - am I required to install something else before R2022b to get this to work?
Then, I set the variable:
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/MATLAB_Runtime/R2022b/glnxa64
Still got the following error with pip install:
RuntimeError: MATLAB R2022b installation not found. Install to default location, or add <matlabroot>/bin/glnxa64 to LD_LIBRARY_PATH, where <matlabroot> is the root of a MATLAB R2022b installation.
Gustavo Patow
2023-3-24
0 个投票
Hi,
I am having more or les sthe same problem with 2023a version. When I try:
python -m pip install .
in the correct folder, I get the error:
error: MATLAB installation in /Applications/MATLAB_R2023a.app/extern/engines/python/../../../bin is maci64, but Python interpreter is maca64. Reinstall MATLAB or use a different Python interpreter.
And when I do:
python -m pip install matlabengine
I get
RuntimeError: MATLAB R2022b installation not found. Install to default location, or add <matlabroot>/bin/maca64 to DYLD_LIBRARY_PATH, where <matlabroot> is the root of a MATLAB R2022b installation.
which shouldn't be because I am using 2023a, so no 2022b installation...
Any idea of how to solve this weird problem?
cheers
gus.-
4 个评论
Keyang Zhang
2023-3-24
编辑：Keyang Zhang
2023-3-24
Long story short, "i" in "maci64" means "Intel", and the second "a" in "maca64" means "arm".
Explanations to the problem:
- First, for now, I believe matlabengine only supports R2022b at this moment. Maybe it is too soon to acquire a R2023a version. So I recommend still using R2022b, or you can wait till matlabengine supports R2023a, but who knows when it will...
- Second, why we getting this error? Because even if you install a macOS version, it is actually still an Intel version translated by Rosetta 2 with all Apple Sillicon (M1/M2) Macs. You need to install the ACTUAL "Native Apple Sillicon" version of MATLAB, which is still in beta, and this is the version we want.
- Lastly, the bad news. According to the webpage (https://www.mathworks.com/support/apple-silicon-r2022b-beta.html), native apple sillicon version of R2022b does not support MATLAB Engine API for Python. So even if we installed a native apple sillicon version of R2022b, we cannot use matlabengine.
Solutions?
- We can install a x86_64 based Python Interpreter, not an arm64 version, so it will not complain about Python Interpreter incompatible with MATLAB, and using the x86_64 version when installing matlabengine might solve the issue.
Gustavo Patow
2023-3-24
Thanks!!! This solved the issue!!! I installed 2022b, conda x86_64, and everything worked as charm!!!
Thanks!!!!
Jyothi Karri
2023-4-19
Hi Gustav,
could you provide more details on which command you used to install the matlab engine using conda?
Gustavo Patow
2023-4-19
The problem was solved by getting back to Matlab 2022b. Thanks anyway!
Thuong
2023-11-6
0 个投票
I am having matlab 2023b, and have exactly problem, anyone solve it for macbook m1, and matlab 2023b?
Carlos Rondon
2024-1-15
0 个投票
Hi, I had the same problem. The issue is not related to matlab but to Anaconda's installation. In my case, I didn't have the latest version which is now compatible with Apple's M processors. Uninstalling conda and updating to the latest version solved all the issues.
Good Luck!
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