Traceback (most recent call last):
  File "<stdin>", line 4, in <module>
  File "rekall\session.py", line 111, in __getattr__
    plugin_cls = self.GetPluginClass(name)
  File "rekall\session.py", line 91, in GetPluginClass
    metadata = self.plugin_db.GetActivePlugin(name)
  File "rekall\plugin.py", line 349, in GetActivePlugin
    if plugin_cls.is_active(self.session):
  File "rekall\plugins\windows\common.py", line 62, in is_active
    return (super(AbstractWindowsCommandPlugin, cls).is_active(session) and
  File "rekall\plugin.py", line 198, in is_active
    session.profile != None)
  File "rekall\session.py", line 754, in profile
    res = self.GetParameter("profile_obj")
  File "rekall\session.py", line 491, in GetParameter
    result = self._RunParameterHook(item)
  File "rekall\session.py", line 519, in _RunParameterHook
    result = hook.calculate()
  File "rekall\plugins\guess_profile.py", line 468, in calculate
    profile_obj = self.ScanProfiles()
  File "rekall\plugins\guess_profile.py", line 409, in ScanProfiles
    session=self.session)
  File "rekall\registry.py", line 56, in __call__
    res = super(UniqueObjectIdMetaclass, cls).__call__(*args, **kwargs)
  File "rekall\scan.py", line 241, in __init__
    needles=self.needles)
  File "rekall\registry.py", line 56, in __call__
    res = super(UniqueObjectIdMetaclass, cls).__call__(*args, **kwargs)
  File "rekall\scan.py", line 349, in __init__
    raise RuntimeError("No needles provided to search.")
RuntimeError: No needles provided to search.