On Thu 04 Nov 2021 at 09:05:16 +0000 David Carlisle <d.p.carlisle at gmail.com> wrote: > I wasn't involved but there appears to be a clash of names with > > /usr/local/texlive/2021/texmf-dist/tex/latex/computational-complexity/ccref.sty Yes, discovered by Karl yesterday. The new "ccref" package will be renamed ASAP. Petra (from CTAN)