Nick Dokos <nicholas.dokos@hp.com> writes:

> Eric S Fraga <e.fraga@ucl.ac.uk> wrote:
>
>> Hi,
>> 
>> I notice that there has been a recent commit which affects export of org
>> files.   I have just needed to export an org file to HTML and get the
>> following error:
>> 
>> : if: Symbol's value as variable is void: backend
>> 
>> The backtrace is:
>> 
>> ,----
>> | Debugger entered--Lisp error: (void-variable backend)
>> |   (eq backend (quote html))
>> |   (if (eq backend (quote html)) (progn (org-exp-bibtex-docites [...]
>> |   (when (eq backend (quote html)) (org-exp-bibtex-docites [...]
>> |   (save-window-excursion (setq oebp-cite-plist [...]
>> |   org-export-bibtex-preprocess()
>> |   run-hooks(org-export-preprocess-hook)
>> |   org-export-preprocess-string( [...] )
>> |   org-export-as-html(nil)
>> |   call-interactively(org-export-as-html)
>> |   org-export(nil)
>> |   call-interactively(org-export nil nil)
>> `----
>> 
>> For now, I am going to disable the invocation of the bibtex
>> preprocessing as this appears to be the only place that =backend=
>> appears.
>> 
>
> It's likely that the only thing needed is to rename backend to
> org-export-current-backend in contrib/lisp/org-exp-bibtex.el.
> See commit 99675ffead44e32f4959909a657b88831fe33703.
>
> Nick

Bastien et al.,

A patch that seems to fix the problem is attached.