Error with plotting mom1 in matplotlib=3.8

[kmhess]

The following error doesn't appear in earlier versions of matplotlib, but magically does in when running SIP with matplotlib = 3.8:

Traceback (most recent call last):
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/bin/sofia_image_pipeline", line 8, in <module>
    sys.exit(main())
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/src/image_pipeline.py", line 190, in main
    make_images.main(source, src_basename, opt_view=opt_view, suffix=suffix, sofia=sofia, beam=beam,
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/src/make_images.py", line 1125, in main
    make_mom1(source, src_basename, cube_params, patch, opt_head, opt_view, HIlowest, suffix=suffix, sofia=2)
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/src/make_images.py", line 518, in make_mom1
    cf = ax1.contour(mom1_d, colors=clevels, levels=levels, linewidths=0.6, transform=ax1.get_transform(cubew))
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/astropy/visualization/wcsaxes/core.py", line 264, in contour
    transform_contour_set_inplace(cset, transform)
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/astropy/visualization/wcsaxes/utils.py", line 176, in transform_contour_set_inplace
    vertices = transform.transform(vertices)
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/matplotlib/transforms.py", line 1495, in transform
    res = self.transform_affine(self.transform_non_affine(values))
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/matplotlib/_api/deprecation.py", line 297, in wrapper
    return func(*args, **kwargs)
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/matplotlib/transforms.py", line 2419, in transform_non_affine
    return self._b.transform_non_affine(self._a.transform(values))
  File "/mnt/home/student/csuvas/miniconda3/envs/sip2/lib/python3.9/site-packages/astropy/visualization/wcsaxes/wcsapi.py", line 318, in transform
    raise ValueError(
ValueError: Expected 2 world coordinates, got 0 

Solution so far is to limit possible versions of matplotlib in setup.py, but will likely need a longer term solution. Maybe it's an astropy compatability with matplotlib issue?

[kmhess]

Sorted with the release of version 1.3.1 which removed version limits. See also #97.