rapt-file search not works

Ubuntu 13.10
apt-file 2.5.2ubuntu1

The search with the apt-file works normal. But when I try the same search with the rapt-file, a python error occurs:

(not that the network connection is ok)

% apt-file search add-apt-reposi
software-properties-common: /usr/bin/add-apt-repository

% rapt-file search add-apt-reposi
Traceback (most recent call last):
  File "/usr/bin/rapt-file", line 130, in <module>
    for res in unpickle(urlopen(url)):
  File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 404, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 422, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1214, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [Errno 101] Network is unreachable>