Thanks Eric... I should have included that my .emacs file has the following
(which I followed from here:
http://orgmode.org/Changes.html#ob-configuration-changes):

;; setup ditaa
(setq org-ditaa-jar-path "~/.elisp/org.git/contrib/scripts/ditaa.jar")
(org-babel-do-load-languages
 'org-babel-load-languages
 '((ditaa . t)
   (gnuplot . t)))
(require 'ob-ditaa)

If I understand correctly, the (ditaa . t) and (require 'ob-ditaa) are
redundant but since it wasn't working, I tried both. Is this what I need to
have babel work with ditaa?

Thanks for any input...
John

On Wed, Jul 21, 2010 at 4:57 PM, Eric Schulte <schulte.eric@gmail.com>wrote:

> Hi John,
>
> Yes, (1) below is the preferred format, however the "ditaa" language is
> not enabled by default.  Please customize the org-babel-load-languages
> variable to enable support for evaluating ditaa code blocks, and then
> try the code block syntax mentioned in (1) below again and a ditaa
> figure should be successfully exported.
>
> A benefit of the (1) (aka Babel) method below is that code blocks can be
> evaluated "live" from inside the Org-mode buffer with C-c C-c.  See
> Chapter 14 of the manual or the relevant portion of the quick guide
> http://orgmode.org/guide/Working-With-Source-Code.html for more
> information on using Babel.
>
> Best -- Eric
>
> John Hendy <jw.hendy@gmail.com> writes:
>
> > Hi,
> >
> >
> > I have been having a difficult time with an export (which includes a
> ditaa
> > graphic) to PDF via LaTeX recently and am puzzled by it. Which is the
> > correct format?
> >
> > 1) Supported by:
> > - http://doc.norang.ca/org-mode.html#playingwithditaa
> > - http://orgmode.org/Changes.html#ob-configuration-changes (indirectly
> seems
> > to indicate this format?)
> >
> > #+begin_src ditaa :file file.png :cmdline -r -S -s 2.5
> > ---
> > Picture here
> > ---
> > #+end_src
> >
> >
> > 2) Supported by:
> > - http://orgmode.org/worg/org-contrib/org-exp-blocks.php
> > -
> >
> http://emacs-fu.blogspot.com/2009/10/writing-presentations-with-org-mode-and.html
> >
> > #+begin_ditaa file.png -r -S -s 2.5
> > ---
> > Picture here
> > ---
> > #+end_ditaa
> >
> > Only #2 is working for me currently, though I suspect that #1 is the
> 'truer'
> > form? Not sure what's going on...
> >
> >
> > Thanks,
> > John
> >
> > P.S. Is there a way to enlarge the output? Using the -s option only seems
> to
> > make the resolution higher, not change the actual size (inches, pixels,
> > whatever) in the LaTeX output...
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>