Thx for the response Bastien i removed (require 'org-install) from my init.el file (correct?) and restarted emacs but get the same error Invalid function: org-babel-header-args-safe-fn i also tried now to downgrade to previous version from 3/8/15 and the error is gone so its 100% reproducible with the 5/8/15 elpa version thx again Z On Fri, Aug 7, 2015 at 6:33 PM, Bastien wrote: > Hi Xebar, > > try removing (require 'org-install), it is not needed since long. > > -- > Bastien >