genarate workflow pic error

[nickolas.c@…]

2012-12-18 16:32:36,717 Trac[main] ERROR: Internal Server Error:
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/web/main.py", line 497, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/web/main.py", line 214, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.6/site-packages/Trac-1.0-py2.6.egg/trac/admin/web_ui.py", line 125, in process_request
    path_info)
  File "/usr/lib/python2.6/site-packages/TracWorkflowAdmin-0.12.0.2-py2.6.egg/tracworkflowadmin/web_ui.py", line 135, in render_admin_panel
    self._parse_request(req)
  File "/usr/lib/python2.6/site-packages/TracWorkflowAdmin-0.12.0.2-py2.6.egg/tracworkflowadmin/web_ui.py", line 685, in _parse_request
    self._update_diagram(req, params) # not return
  File "/usr/lib/python2.6/site-packages/TracWorkflowAdmin-0.12.0.2-py2.6.egg/tracworkflowadmin/web_ui.py", line 444, in _update_diagram
    self._create_diagram_image(path, dir, script, errors)
  File "/usr/lib/python2.6/site-packages/TracWorkflowAdmin-0.12.0.2-py2.6.egg/tracworkflowadmin/web_ui.py", line 464, in _create_diagram_image
    proc.stdin.write(script)
IOError: [Errno 32] Broken pipe

[anonymous]

It seems that graphviz is missing in your system. The plugin requires graphviz. Could you please enable ​t:TracLogging and post a relevant log file?

[Jun Omae]

No response.