The problem is that tangling in an indirect buffer does not work. I'll post another email concerning this. Thanks, Rainer Rainer M Krug writes: > Hi > > I get an error #(wrong-type-argument stringp nil)# when I tangle a > subtree, but tangling the whole document works. > > ,---- > | GNU Emacs 24.5.1 (x86_64-apple-darwin14.5.0, Carbon Version 157 > | AppKit 1348.17) of 2015-08-28 on Rainers-MacBook-Pro.local > | Org-mode version 8.3.1 (release_8.3.1-166-g5bfdfc @ /Users/rainerkrug/.emacs.d/org-mode/lisp/) > `---- > > The backtrace is below > > Let me know if you need any further info > > Thanks, > > Rainer > [snip: Long Backtrace (11 lines)] -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Stellenbosch University South Africa Tel : +33 - (0)9 53 10 27 44 Cell: +33 - (0)6 85 62 59 98 Fax : +33 - (0)9 58 10 27 44 Fax (D): +49 - (0)3 21 21 25 22 44 email: Rainer@krugs.de Skype: RMkrug PGP: 0x0F52F982