Can't create Anaconda environment with python=3.4

Question

I'm trying to set up a Anaconda environment with Python=3.4.

(base) C:\WINDOWS\system32>conda create -n py34 version=3.4

I already include the conda-forge channel, but still get this error:

Collecting package metadata (current_repodata.json): done
Solving environment: failed with current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

  - version=3.4

Current channels:

  - https://repo.anaconda.com/pkgs/main/win-64
  - https://repo.anaconda.com/pkgs/main/noarch
  - https://repo.anaconda.com/pkgs/r/win-64
  - https://repo.anaconda.com/pkgs/r/noarch
  - https://repo.anaconda.com/pkgs/msys2/win-64
  - https://repo.anaconda.com/pkgs/msys2/noarch
  - https://conda.anaconda.org/conda-forge/win-64
  - https://conda.anaconda.org/conda-forge/noarch

To search for alternate channels that may provide the conda package you're
looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.

When i try it with:

(base) C:\WINDOWS\system32>conda create -n py34 python=3.4 -c conda-forge

I get:

Collecting package metadata (current_repodata.json): done
Solving environment: failed with current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed

UnsatisfiableError: The following specifications were found to be incompatible with each other:



Package vc conflicts for:
python=3.4 -> vc=10
Package pip conflicts for:
python=3.4 -> pip
Package vs2010_runtime conflicts for:
python=3.4 -> vs2010_runtime

I'm pretty new to Anaconda and Python and dont know what to search for anymore.

This post: Why conda cannot create environment with python=3.4 installed in it didnt help either.

Callum Biggs · Answer 1 · 2019-07-31T10:15:21.213

Firstly you can provide more details by increasing the verbosity of the create command, which will provide useful debug messages. Each -v increases the verbosity from INFO to DEBUG to TRACE. I normally always use DEBUG because I hate seeing it just sit there when solving an environment.

conda create -v -v -v -n py34 python=3.4

I don't believe you needed to add conda-forge, the problem with your first command was that you didn't specify python=3.4, you did version=3.4. Try it without conda-forge and including python=3.4 instead.

It also looks like your conda is broken, it's failing to resolve the environments which is likely not helping the situation. Try to fix that with

conda update --all

If you are still stuck with the same problem then review the conflicts with the following commands

conda info vc
conda info pip
conda info vs2010_runtime

I believe there is a chance that some of the packages in your base are incompatible with 3.4. In this case you could try to install without any default packages

conda create --no-default-packages -n py34 python=3.4

If you are still running into issues, there is a chance there is something janky with your config files, so I would try doing a complete uninstall of anaconda on windows. And then attempt this again.

FInally at my PC again to try your fixes. Unfortunaly nothing helped, I still get the same errors. Something seems really off with my installation of Anaconda. Even tried to uninstall and reinstall Anaconda. With the "no-default-packages" command i still get the same 'UnsatisfiableError' — mehe, Jul 30 '19 at 22:20
I've updated my answer to try to help. Hopefully a full and total reinstall of Anaconda will help, or the debug messages will give some further light on this issue — Callum Biggs, Jul 31 '19 at 10:18

score 3 · Accepted Answer · answered Aug 01 '19 at 10:40

Ok, 3 days later i found out that the latest Version of Anaconda is kinda broken. I downgraded to version 4.6.14 and now everythings seems to work.

conda config --set allow_conda_downgrades true
conda install conda=4.6.14

Solving environment: failed with current_repodata.json, will retry with next repodata source. UnsatisfiableError:

Can't create Anaconda environment with python=3.4

2 Answers2