wri_fits_abs WCS not understood by astropy or wcslib
I am unsure if it is an old feature or an issue, but wri_fits_abs use "DEC---TAN" as a header keyword instead of "DEC--TAN" as done by wrf_fits_abs. So it raises an error when reading maps produced with that code with astropy or wcslib in release-8.
It is only used in imtosou.c to create imult.fits and zonemult.c to create the final map. I can push a modification in these two files to switch to wrf_fits_abs, but I don't know why it was here in the first place.