That works as does the attempt on my *home* computer. I was at work earlier.
I'm truly perplexed as from memory I just cannot think of anything different
between the home and work .emacs files that would do this. I want to go back
and look at the load languages section from the work one, though, as I got
the same error at home prior to adding that section. I'm wondering if I have
a typo somewhere (though I did copy and paste what's below so just not
sure!).

I'll try again and post back tomorrow. I truly appreciate the help.

John

On Wed, Jul 21, 2010 at 10:22 PM, Eric Schulte <schulte.eric@gmail.com>wrote:

> Hi John,
>
> Yes the following should be sufficient
>
> ;; 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)))
>
>
> What happens if you try to evaluate the following in an Org-mode buffer
> with C-c C-c?
>
> #+begin_src ditaa :file example.png
>  +---------------+
>  |               |
>  | ditaa example |
>  |               |
>  +---------------+
> #+end_src
>
> Best -- Eric
>
> John Hendy <jw.hendy@gmail.com> writes:
>
> > 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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> >> > Emacs-orgmode@gnu.org
> >> > http://lists.gnu.org/mailman/listinfo/emacs-orgmode
> >>
>