I would hazard that the problem comes from an interaction between ( LibRaw or poppler ) and another unknown required library that is also compiled for ufraw. Who really knows? It's working for me now. John.
I fixed this for myself by building libraw and poppler-0.26.5. The LibRaw was from git somewhere. I happened upon this fix by starting ufraw in a console / window / shell. It threw some messages about missing files (I'm guessing the LibRaw and I'm pretty sure about poppler.) I've not had a problem since. HTH. John.
Ufraw defaults to wrong output size.
UFRAW (from CVS) does not pass EXIF data to gimp-2.9.1
Nils: I just saw your patch and applied it. :-) Thanks! Problem fixed. John.
Changes to color temperature throws an error message