Windows Python 3.11, 3.12 matrix CI fail due to `ImportError: DLL load failed while importing pdffit2`

[bobleesj]

Problem

Windows Python 3.11 and 3.12 fail due to ImportError: DLL load failed while importing pdffit2

Ref: https://github.com/diffpy/diffpy.pdfgui/actions/runs/12215530301/job/34077576222

In our CI, since we are also testing pdffit, we install pdfgui using the following methods:

          conda install --file requirements/test.txt
          conda install wxpython diffpy.utils matplotlib-base
          pip install diffpy.pdffit2==1.4.4rc6
          python -m pip install . --no-deps

using the installation method above, I was able to run pdfgui via macOS ARM64.

Proposed solution

But I recall this was a problem back then. @sbillinge @Tieqiong any insights on this DLL lad import problem?

I will have access to a windows laptop in the next 2-3 days or so.

[sbillinge]

I thought the problems we had with windows were finding gsl during the build. @Tieqiong so you remember this problem?

We could try and solve it out just jump to the full 3.13 and work on everything together? Install pdffit2 from conda-forge and see if that fixes it?