Now it worked. I added (add-to-list 'org-src-lang-modes '("mathematica" . "mma")). After that font lock and edit source works. Thank @Bastien for the help! On Thu, Jan 9, 2014 at 11:31 AM, Yi Wang wrote: > Ah, now the problem appears. It says "No such language mode: > mathematica-mode". > > So there is a mismatch between the name mathematica (which I used as name > in org-babel extension) and the name mma-mode (which is provided by > mma.el). > > However, as auto-mode-alist suggests (where there is ("\\.m\\'" . > mma-mode), and no entry with mathematica-mode), I still have no idea > why org-edit-special looks for mathematica-mode instead of mma-mode. > > > On Thu, Jan 9, 2014 at 11:15 AM, Bastien wrote: > >> Yi Wang writes: >> >> > (1) If I open a .m file, there is font lock. Thus the problem >> > shouldn't be binding between mma.el and .m files. >> > (2) If I insert a src block of C or python code in org mode, there is >> > font lock. Thus the problem shouldn't be org-src-fontify-natively >> > (and I checked it is indeed t). >> >> What happen if you C-c ' on a .m block? >> >> -- >> Bastien >> > >