Shiyuan <gshy2014@gmail.com> writes:

> Hi all,
> I am using Emacs 24.3.9 + org-mode 8.2.6(from ELPA)
> I followed this instruction
> http://orgmode.org/worg/org-contrib/babel/languages.html#configure
>
> and added the following to my .emacs file.
>
> (org-babel-do-load-languages
> 'org-babel-load-languages
> '((python . t)
> (emacs-lisp . t)))
>
> After that, org-mode mysteriously switched back to the old version
> 7.9. Another problem is that export command C-c C-e no longer works
> and generates error: Symbol's function definition is void:
> org-defvaralias. Is there any step I missed? Thanks.
>
> Shiyuan

Hi Shiyuan,

Have you tried to put (package-initialize) early (say first line) in
your .emacs?

Best,

Jorge.