Dashes are usually fine. Did you try replacing the _ with -?

I try to avoid _ in filenames, but - works for me.

On Thu, Feb 5, 2015 at 6:42 PM, Timothée Flutre <timflutre@gmail.com> wrote:

> In the org file, it would look like this:
> #+latex_header: \graphicspath{ {./images/} }
> [[file:simul001_a-4_b-0.1.pdf]]




John

-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
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412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu