Well actually I think the error shows because of another block below the emacs-lisp blocks. In this header I just wrote #+BEGIN_SRC without any language name. Is it actually wrong and maybe I should have written #+BEGIN_EXAMPLE instead? Though I’d still say it probably shouldn’t have failed the export?… On 20. August 2015 at 17:38:36, JI, Xiang (hi@xiangji.me) wrote: I’m trying to export all my agenda files into an ics file via org-icalendar-combine-agenda-files. However, the export process stops halfway through. The following are shown in Messages: org-babel-exp process emacs-lisp at line 72... org-babel-exp process emacs-lisp at line 208... user-error: No language for src block: (unnamed) which is weird because I already set org-calendar-include-body to nil. I don’t think a code block in the middle of a org file should impact iCalendar export. The code block begins with #BEGIN_SRC emacs-lisp and is highlighted correctly. I’m not sure why it says “no language for src block”. Regards, JI, Xiang