Something

Traceback (most recent call last):
  File "webpage.py", line 19, in application
    tmpl = jinja_env.get_template('not_found.html')
  File "/usr/lib/python2.5/site-packages/Jinja-1.2-py2.5-linux-i686.egg/jinja/environment.py", line 222, in get_template
    return self._loader.load(filename)
  File "/usr/lib/python2.5/site-packages/Jinja-1.2-py2.5-linux-i686.egg/jinja/loaders.py", line 96, in load
    return self.loader.load(self.environment, name, translator)
  File "/usr/lib/python2.5/site-packages/Jinja-1.2-py2.5-linux-i686.egg/jinja/loaders.py", line 293, in load
    environment, name, translator)
  File "/usr/lib/python2.5/site-packages/Jinja-1.2-py2.5-linux-i686.egg/jinja/loaders.py", line 183, in load
    ast = self.parse(environment, name, None)
  File "/usr/lib/python2.5/site-packages/Jinja-1.2-py2.5-linux-i686.egg/jinja/loaders.py", line 176, in parse
    source = self.get_source(environment, name, parent)
  File "/usr/lib/python2.5/site-packages/Jinja-1.2-py2.5-linux-i686.egg/jinja/loaders.py", line 424, in get_source
    raise TemplateNotFound(name)
jinja.exceptions.TemplateNotFound: not_found.html