[O] No image output from Maxima in Babel

[Zachary Peterson]

Hello,

After recently learning about Babel, I've been working my way through
some of the examples in the various languages' documentation, and I've
run into a problem with Maxima. I evaluated this code, taken from the
documentation at
http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-maxima.html#sec-4-3,
with only the filename changed:

#+name: 3d-maxima
#+header: :file maxima-3d.png
#+header: :exports results
#+header: :results graphics
#+begin_src maxima 
  programmode: false;
  plot3d(atan(-x^2+y^3/4),[x,-4,4],[y,-4,4],[grid,50,50],[gnuplot_pm3d,true]);
#+end_src

It returns this:
#+RESULTS: 3d-maxima
[[file:maxima-3d.png]]

The file is empty, though.

Running the code from within the Maxima REPL produces the expected
result.

I'm running Org version 20160201 on GNU Emacs 24.4.1 with Maxima 5.34.1
on Debian Jessie.

I would appreciate any help. Thanks.
-- 
Zachary Peterson
address@hidden
(317) 828-2377
OpenPGP key: BF5879D6