# Sphinx version: 1.1.3
# Python version: 3.2.2
# Docutils version: 0.8.1 release
# Jinja2 version: 2.6
Traceback (most recent call last):
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\cmdline.py", line 189, in main
    app.build(force_all, filenames)
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\application.py", line 204, in build
    self.builder.build_update()
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\builders\__init__.py", line 196, in build_update
    'out of date' % len(to_build))
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\builders\__init__.py", line 252, in build
    self.write(docnames, list(updated_docnames), method)
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\builders\__init__.py", line 292, in write
    self.write_doc(docname, doctree)
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\builders\html.py", line 419, in write_doc
    self.docwriter.write(doctree, destination)
  File "C:\Python32\lib\site-packages\docutils-0.8.1-py3.2.egg\docutils\writers\__init__.py", line 77, in write
    self.translate()
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\writers\html.py", line 38, in translate
    self.document.walkabout(visitor)
  File "C:\Python32\lib\site-packages\docutils-0.8.1-py3.2.egg\docutils\nodes.py", line 173, in walkabout
    if child.walkabout(visitor):
  File "C:\Python32\lib\site-packages\docutils-0.8.1-py3.2.egg\docutils\nodes.py", line 173, in walkabout
    if child.walkabout(visitor):
  File "C:\Python32\lib\site-packages\docutils-0.8.1-py3.2.egg\docutils\nodes.py", line 165, in walkabout
    visitor.dispatch_visit(self)
  File "C:\Python32\lib\site-packages\docutils-0.8.1-py3.2.egg\docutils\nodes.py", line 1604, in dispatch_visit
    return method(node)
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\ext\graphviz.py", line 243, in html_visit_graphviz
    render_dot_html(self, node, node['code'], node['options'])
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\ext\graphviz.py", line 197, in render_dot_html
    fname, outfn = render_dot(self, code, options, format, prefix)
  File "C:\Python32\lib\site-packages\sphinx-1.1.3-py3.2.egg\sphinx\ext\graphviz.py", line 125, in render_dot
    str(self.builder.config.graphviz_dot) + \
TypeError: can't concat bytes to str