From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric S Fraga <e.fraga@ucl.ac.uk>
Subject: Re: LaTeX export: Unknown LaTeX class `org-article'
Date: Sat, 25 Jan 2014 12:34:34 +0000
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To: Peter Davis <pfd@pfdstudio.com>
Cc: emacs-orgmode@gnu.org

Peter Davis <pfd@pfdstudio.com> writes:

[...]

> Ok, something weird is going on. This worked on my office MacBook, but
> when I try on the home one, also with org 8.2.3c,
> org-export-latex-classes is defined, but org-latex-classes is not.
>
> Any clues?

this sounds like a mixed installation.  do you have an old version of
org lying around, maybe as part of the emacs installation?  are the two
systems running different versions of emacs?

where does "M-x find-library RET org RET" take you?
-- 
: Eric S Fraga (0xFFFCF67D), Emacs 24.3.1, Org release_8.2.4-322-gece429