graphviz plugin problem

[izghitu@…]

Hello, I have 2 Fedora Core 4 servers with python-2.4.1-2

I installed the graphviz plugin for trac (I have trac 0.9.5) On the first server everything went smooth without any problems. However on the second server after doing everything just like on the first one I get this error when trying to use graphviz:

Trac detected an internal
error: [Errno 32] Broken pipe

Python traceback Traceback (most recent call last):

File "/usr/lib/python2.4/site-packages/trac/web/cgi_frontend.py", line
130, in run

dispatch_request(req.path_info, req, env)

File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 139, in
dispatch_request

dispatcher.dispatch(req)

File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 107, in dispatch

resp = chosen_handler.process_request(req)

File "/usr/lib/python2.4/site-packages/trac/wiki/web_ui.py", line 92,
in process_request

self._render_editor(req, db, page, preview=True)

File "/usr/lib/python2.4/site-packages/trac/wiki/web_ui.py", line 311,
in _render_editor

infopage_html? = wiki_to_html(page.text, self.env, req, db)

File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line
747, in wiki_to_html

Formatter(env, req, absurls, db).format(wikitext, out, escape_newlines)

File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line
576, in format

self.handle_code_block(line)

File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line
546, in handle_code_block

self.out.write(self.code_processor.process(self.req, self.code_text))

File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line
108, in process

text = self.processor(req, text)

File "/usr/lib/python2.4/site-packages/trac/wiki/formatter.py", line
98, in _macro_processor

return macro_provider.render_macro(req, self.name, text)

File "/home/trac/scs/plugins/graphviz-0.6.3-py2.4.egg/graphviz/graphviz.py",
line 169, in render_macro File
"/home/trac/scs/plugins/graphviz-0.6.3-py2.4.egg/graphviz/graphviz.py",
line 369, in launch

IOError: [Errno 32] Broken pipe

Please help Thank you

[Peter Kropf]

It seems that the Fedora graphviz package wasn't installed. This should have been detected by the configuration checking code but wasn't. Perhaps there's some Fedora specific problem with checking for the existance of the dot, neato and other graphviz programs. I bit more debugging into the problem is needed...

[Noah Kantrowitz]

Fixing traceback.