Error when trying to use 'rosinit' command

I'm very new to ROS and when I try to launch the 'rosinit' command on my M1 mac i receive the following message/error:

>> rosinit

Launching ROS Core...

Adding required Python packages to virtual environment..chmod: /Users/mattiawaitz/.matlab/R2021a/ros1/maci64/venv/bin/activate: No such file or directory

bash -c 'PATH=$PATH:/System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS ; /Users/mattiawaitz/.matlab/R2021a/ros1/maci64/venv/bin/activate ; DYLD_LIBRARY_PATH=/System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/lib /Users/mattiawaitz/.matlab/R2021a/ros1/maci64/venv/bin/python -m ensurepip --upgrade --no-default-pip -v -v -v': Killed

Done.

Could not install the required Python packages. System error message: bash:

/Users/mattiawaitz/.matlab/R2021a/ros1/maci64/venv/bin/activate: No such file or directory

bash: line 1: 91406 Killed: 9

DYLD_LIBRARY_PATH=/System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/lib

/Users/mattiawaitz/.matlab/R2021a/ros1/maci64/venv/bin/python -m ensurepip --upgrade --no-default-pip -v -v -v

. Use pyenv function to set the path to the Python executable and retry the command.

I've installed Python 2.7 as requested by the help page and already tried using the 'pyenv' command as suggested by MATLAB in the last line.

Answer 1

[Jagadeesh Konakalla]

Hi Mattia Waitz ,

Can you try the following once and let me know ?

>> pyenv('Version',<path to python 2.7>);

>> ros.internal.createOrGetLocalPython(true);

>> rosinit

Thanks and regards,

Jagadeesh

[Mattia Waitz]

Thanks for the reply. I tried without success, although by switching to my old windows 10 laptop I managed to launch rosinit without problems. Sadly at this point the problem might be the ARM architecture of my M1 Mac.

• pyenv() says that the version is the 2.7 but the problem when I launch the commmand is the one reported on the original question.
• ros.internal instead returns a different error:

Error using ros.internal.createOrGetLocalPython (line 142)

Could not create Python virtual environment: New python executable in /Users/mattiawaitz/.matlab/R2021a/ros1/maci64/venv/bin/python

ERROR: The executable /Users/mattiawaitz/.matlab/R2021a/ros1/maci64/venv/bin/python is not functioning

ERROR: It thinks sys.prefix is '/Users/mattiawaitz/Documents/MATLAB/Examples/R2021a/ros/StartROSCoreAndGlobalNodeROSExample' (should be

u'/Users/mattiawaitz/.matlab/R2021a/ros1/maci64/venv')

ERROR: virtualenv is not compatible with this system or executable

. Verify there is sufficient space on disk and retry the command.

[Jagadeesh Konakalla]

Hi Mattia,

I agree that issue is with Apple M1 hardware only. Please try my below suggestion and let me know.

I have received the same error as you posted now, when i used the default Python 2.7 available with M1 mac on one of our lab machine. I have the maci (intel) version Python executable on shared drive. So, I have provided the maci Python path to Pyenev and ran the rosinit and it worked.

Please note that MATLAB does not support natively on Apple M1. In the future release, the native supprt for M1 will be available. For now, MATLAB uses rosetta environment to run on the Apple M1 hardware. For more information please see the following link.

https://www.mathworks.com/support/requirements/matlab-system-requirements.html

Thanks and regards,

Jagadeesh K.

[Mattia Waitz]

Sorry for the continuous disturb, but I have one last question: how can I retrieve the maci version? I downloaded the 2.7.18 from python.org, which I assume is an intel version especially since it dates back to early 2020. As far as the path goes, the command I write down is the following

>> pyenv('Version','/Applications/Python2.7');

which returns a message saying that it can't find any valid executable.

Again sorry for the disturb and thanks for the kind responses.

Mattia

[Jagadeesh Konakalla]

Hi Mattia,

I think it is installed in /usr/local/bin.

So, try the following. It should work

>>pyenv("Version","/usr/local/bin/python")