2018-01-29 2:34 GMT+01:00 Berry, Charles <ccberry@ucsd.edu>:

> On Jan 28, 2018, at 3:24 PM, Nicolas Goaziou <mail@nicolasgoaziou.fr> wrote:
>
> Would you have an ECM? I don't know what is "the by-backend trick".

Not a bug AFAICS.

`by-backend' is a macro mentioned here:

https://lists.gnu.org/archive/html/emacs-orgmode/2013-07/msg00500.html

I guess it needs to use `org-export-current-backend' if it is to be handled in recent org versions.

Thanks for the pointer to the variable but that is not the problem.

You should have a look at commit 38be85124551083d269.

It prevents evaluation of the by-backend form in parameters.

Fabrice