Remember to cover the basics, that is, what you expected to happen and what in fact did happen. You don't know how to make a good report? See
http://orgmode.org/manual/Feedback.html#Feedback Your bug report will be posted to the Org-mode mailing list. ------------------------------------------------------------------------ Now there exists 'org-babel-after-execute-hook'. I want to implement this functionality: Check whether the path specified in `:file' exists in file system and throw an error if that does not exists. If there is `org-babel-before-execute-hook', we can do that instead of using advice. I love symmetry :) Emacs : GNU Emacs 25.1.50.1 (x86_64-apple-darwin15.5.0, NS appkit-1404.47 Version 10.11.5 (Build 15F34)) of 2016-07-03 Package: Org-mode version 8.3.4 (8.3.4-99-ga8e4a3-elpa @ /Users/macbookair/.emacs.d/elpa/org-20160704/)