Hi I use Org-babel for literate programming in R, but the tangling takes quite long. Therefore my question: as it is possible to evaluate a single code block, is it possible to evaluate ALL code blocks i a document? that would make debugging much easier. Also: is it possible, to get some kind of automatic headings for the tangled code blocks? That would make it easier to identify in which code block the source code in the tangled file comes from. 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