Hi,

with latest org from git I get an error when trying to export to pdf:

  shell-quote-argument: Wrong type argument: arrayp, nil

bisecting shows:
91dc1b34e3033c56b71fca16d8b9403c3585c66e is the first bad commit
commit 91dc1b34e3033c56b71fca16d8b9403c3585c66e
Author: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Date:   Tue Dec 20 17:10:46 2016 +0100

    ox: Add EXPORT_FILE_NAME keyword

    * lisp/ox.el (org-export-output-file-name): Support EXPORT_FILE_NAME
      keyword.
    * doc/org.texi (Export settings): Document new keyword.
    * testing/lisp/test-ox.el (test-org-export/output-file-name): Add
      tests.

Is the culprit.

(I didn't use EXPORT_FILE_NAME)

This happens on Win7 and Linux

GNU Emacs 24.5.1 (i686-pc-mingw32) of 2015-04-11 on LEG570
Org mode version 9.0.2 (release_9.0.2-136-g7fd61c @ <path-to-git-repo>)

Best regards
  Thomas