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cibr-jyu / meggie

User-friendly MNE-python based graphical user interface to do MEG and EEG analysis with multiple subjects

Home Page:https://cibr-jyu.github.io/meggie

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Failing to install

r-lamarque opened this issue · comments

commented

Hello,

I am quite new to both mne-python and python in general, so I wanted to try out Meggie which seems very practical. Unfortunately, I cannot install it. First, there seems to be an issue when creating the environment

(base) C:\Users\Lamarque>conda create -n meggie-env -c conda-forge meggie
Collecting package metadata (current_repodata.json): done
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: done

The second "solving environment" takes a lot of time, but from there, it seems to be installing just fine. However, when activating the environment and running "meggie", I get a fatal error:

(base) C:\Users\Lamarque>conda activate meggie-env

(meggie-env) C:\Users\Lamarque>meggie
Fatal error in launcher: Unable to create process using '"D:\bld\meggie_1671057991386_h_env\python.exe" "C:\Users\Lamarque\anaconda3\envs\meggie-env\Scripts\meggie.exe" ': The system cannot find the file specified.

Am I doing something wrong? Can someone help me with this?

Best regards,
Rémi Lamarque

commented

Hi!

The commands you use seem fine. You are using Windows right? Are you using Anaconda Prompt to run the commands? Is this a fresh install of Anaconda? If not, could you consider reinstalling Anaconda if that would help..?

Hope we'll get it to work!
Tk

commented

Hello,

Thank you for you answer. I am using Windows indeed. And I do use the Anaconda Prompt. I got that error on a brand new PC (Windows 11), and a brand new install of Anaconda. It is basically the first thing I tried to do on that PC. But I got a similar result on my old PC (Windows 10), and a colleague tried to install on his own PC with the same result.

So I think there may be something we are missing/doing wrong. Do we need to install something else first? We have a recent enough version of python and mne-python.

Best,
Rémi

commented

Ok, thanks for the information! I'll try to replicate and then fix the problem.

Best,
Erkka

commented

Ok, it seems conda build system on windows does not magically get the setuptools entry_points right and thus they need to be explicitly specified in the meta.yaml:

conda-forge/meggie-feedstock@2b7d5ee

Anyway, you should now be able to get the fixed version by entering the already existing environment and then installing again. So, in Anaconda Prompt:

> conda activate meggie-env
> conda install -c conda-forge meggie
> meggie

This should replace the broken version with a fixed one. It should not take as long as it takes with the from-scratch installation. Hope it works and please tell if it does not!

The long installation times are, I think, inevitable with the ambitious dependency resolution mechanisms of conda and the large search spaces. One might be able to guide it by specifying some of the versions, maybe like:

> conda create -n meggie-env -c conda-forge python=3.10 meggie=1.4.3 mne=1.3.0

Best regards,
-- Erkka

commented

Hello,

I was not able to fix the existing environment, but I removed everything and tried again with "conda create -n meggie-env -c conda-forge meggie", and now it works!

Also, the long installation is not really a problem. It's still manageable. I just mentioned it as it was not working and I thought it may be relevant to the issue.

Thank you very much for your help!

Best regards,
Rémi Lamarque