Mod_python error: "PythonHandler trac.web.modpython_frontend"

Traceback (most recent call last):

  File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch

  File "/usr/lib/python2.4/site-packages/trac/web/modpython_frontend.py", line 87, in handler

  File "/usr/lib/python2.4/site-packages/trac/web/wsgi.py", line 87, in run

  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 440, in dispatch_request
    req.send_error(sys.exc_info(), status=500)

  File "/usr/lib/python2.4/site-packages/trac/web/api.py", line 380, in send_error

  File "/usr/lib/python2.4/site-packages/trac/web/clearsilver.py", line 290, in render

Error: Traceback (innermost last):
  File "csparse.c", line 333, in cs_parse_file()
  File "neo_files.c", line 86, in ne_load_file_len()
SystemError: Unable to open file /usr/share/trac/templates/error.cs: [24] Too many open files