On Mon, May 25, 2015 at 8:30 PM, John Kitchin <jkitchin@andrew.cmu.edu>
wrote:

> With emacs -Q, and this org file:
>
> #+BEGIN_SRC emacs-lisp
> (org-babel-do-load-languages
>  'org-babel-load-languages
>  '((emacs-lisp . t)
>    (python . t)))
> #+END_SRC
>
> #+RESULTS:
>
> #+BEGIN_SRC python :session with_matplotlib :results file :exports both
> import matplotlib
> matplotlib.use('Agg')
> import matplotlib.pyplot as plt
> fig=plt.figure(figsize=(3,2))            # 4
> plt.plot([1,3,2])                              # 3
> plt.savefig('myfig.png')                  # 2
> 'myfig.png'                                     # 1
> #+END_SRC
>
> #+RESULTS:
> [[file:myfig.png]]
>
>
As I mentioned before, if I evaluate the second block as-is I get the
error. However, if I comment out all the lines except #1 then the code
returns the correct results block. Then, I started to add the numbered
lines. Adding #2 and #3 still doesn't break the behavior. Once adding line
#4 the behavior breaks. Maybe this observation can be helpful? This happens
both when starting Emacs -Q or without -Q.