Hi I have the attached org file. It seems that when exporting to a pdf, the :session argument is ignored, as I get a Org-Babel Error Output buffer with: Error: object 'x' not found Execution halted and an Org-Babel Error buffer with the same text, and the resulting pdf does only show the code.. HTML export, works as expected. If I put :session *R_test* behind #+begin_src (R2.org) it works. 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