Hi I am trying to use "tangle with comments". Based on a previous thread, I set org-babel-tangle-w-comments to t with (setq org-babel-tangle-w-comments t) in my emacs.org file. The variable is actually set to 1 - I checked vie C-h - v But nothing is changing in the tangled file? Am I doing something wrong? Or are comments not supported in R in org-babel? I attach a small testfile. Cheers, Rainer -- NEW GERMAN FAX NUMBER!!! Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Natural Sciences Building Office Suite 2039 Stellenbosch University Main Campus, Merriman Avenue Stellenbosch South Africa Cell: +27 - (0)83 9479 042 Fax: +27 - (0)86 516 2782 Fax: +49 - (0)321 2125 2244 email: Rainer@krugs.de Skype: RMkrug Google: R.M.Krug@gmail.com