RuntimeError: Could not open file /var/trac/project/cache/tracmetrixplugin/dailybacklog.png

[ruben@…]

How to Reproduce

While doing a GET operation on /pdashboard, Trac issued an internal error.

Just click on dashboard tab. I was on debian etch and upgraded to lenny in order to have the good library versions.

Request parameters:

{'imagename': None}

System Information

Trac	0.11b1
Python	2.4.4 (#1, Jan 3 2008, 13:33:54) [GCC 4.2.3 20071123 (prerelease) (Debian 4.2.2-4)]
setuptools	0.6c7
SQLite	2.8.17
pysqlite	1.0.1
Genshi	0.4.4
Subversion	1.4.4 (r25188)

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/Trac-0.11b1-py2.4.egg/trac/web/main.py", line 398, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/Trac-0.11b1-py2.4.egg/trac/web/main.py", line 195, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/TracMetrixPlugin-0.1.5-py2.4.egg/tracmetrixplugin/web_ui.py", line 122, in process_request
    return self._render_view(req, db)
  File "/usr/lib/python2.4/site-packages/TracMetrixPlugin-0.1.5-py2.4.egg/tracmetrixplugin/web_ui.py", line 196, in _render_view
    daily_backlog_chart_path = tkt_group_metrics.get_daily_backlog_chart(backlog_history)
  File "/usr/lib/python2.4/site-packages/TracMetrixPlugin-0.1.5-py2.4.egg/tracmetrixplugin/model.py", line 488, in get_daily_backlog_chart
    fig.savefig(path)
  File "/usr/lib/python2.4/site-packages/matplotlib/figure.py", line 759, in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "/usr/lib/python2.4/site-packages/matplotlib/backends/backend_agg.py", line 478, in print_figure
    self.renderer._renderer.write_png(str(filename))
RuntimeError: Could not open file /var/trac/project/cache/tracmetrixplugin/dailybacklog.png

[anonymous]

To fix it : chmod 777 /var/trac/project/cache/tracmetrixplugin/