Problem in installing Mantid environment on Windows

ghc · January 12, 2023, 11:46am

Hello, I installed Anaconda3 (Ver. 2021.05, Python 3.8.8 64bit) and tried to install Mantid package using conda command but failed. The information is as below:

(base) PS C:\Windows\system32>  conda install -c mantid mantid
Collecting package metadata (current_repodata.json): done
Solving environment: /
The environment is inconsistent, please check the package plan carefully
The following packages are causing the inconsistency:

  - <unknown>/linux-64::mantid==6.5.0=py38hea6597a_0
failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: |
The environment is inconsistent, please check the package plan carefully
The following packages are causing the inconsistency:

  - <unknown>/linux-64::mantid==6.5.0=py38hea6597a_0
failed with initial frozen solve. Retrying with flexible solve.
Solving environment: /
Found conflicts! Looking for incompatible packages.
This can take several minutes.  Press CTRL-C to abort.
failed

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

Output in format: Requested package -> Available versions

(base) PS C:\Windows\system32>

I also tried other Anaconda versions, but failed again.
I just want to know how to use Mantid package on Windows without Mantid Workbench.
Thanks.

thomashampson · January 12, 2023, 12:28pm

Hi,

It looks like you are trying to install mantid into your base conda environment. You will need to create a new conda enviornment and activate it before installing mantid. e.g:

conda create -n mantid_env
conda activate mantid_env
conda install -c mantid mantid

where mantid_env is the name of your new conda environment.

Thanks,
Tom

ghc · January 12, 2023, 12:56pm

Hi, Tom. Thank you for your reply. I created a new conda environment and tried to install Mantid, but failed again.

(base) PS C:\Windows\system32> conda activate mantid_env
(mantid_env) PS C:\Windows\system32> conda install -c mantid mantid
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: \
Found conflicts! Looking for incompatible packages.
This can take several minutes.  Press CTRL-C to abort.
                                                                                                                       |failed

UnsatisfiableError:

(mantid_env) PS C:\Windows\system32>

thomashampson · January 13, 2023, 9:20am

Hi,

Can you update your Conda with:

conda update conda

and try again? It worked for me after Conda updates to version 22.11.1, otherwise I think I was having the same problem as you.

Thanks,
Tom

ghc · January 18, 2023, 7:30am

Hi, Tom. Thank you very much for your replies. I tried again and failed. Maybe there are some problems in my Windows. I have given up to install Mantid environment in Windows and I am using a Linux system in a virtual machine instead.
Thanks again.
Haichuan

thomashampson · January 19, 2023, 3:22pm

Hi Haichuan,

Sorry to hear that you’re still having trouble installing Mantid into a Conda environment. If you wanted to attempt to use Windows again, we have found that mamba (download and install mambaforge here) is a lot faster and more reliable when attempting to resolve all of the dependencies.

Thanks,
Tom

fengex · March 27, 2023, 9:24am

Hi Tom
I’ve meet similar problem when I install Mantid in my anaconda env “py38”. Followed you suggestions, I use mamba to detect the dependencies of mantid, then install them using “conda install”, and finally get mantid installed successfully.
mantid 6.6.0 py38hec61f87_0 mantid
markupsafe 2.1.1 py38h2bbff1b_0 defaults
matplotlib 3.5.2 py38haa95532_0 defaults

However, it is still not ok to import in a jupyter notebook, or Ipython kernel. have you meet similar problem? or any idea to solve it?
from mantid.simpleapi import *
Got error: ImportError Traceback (most recent call last)
File C:\anaconda3\envs\py38\lib\site-packages\mantid\utils_utils.py:37, in import_mantid_cext(modulename, package, caller_globals)

Thanks
Erxi