title: How to solve "rospkg.common.ResourceNotFound" in ros-indigo-ubuntu (14.04)?
body: <p>I am doing face detection robot using ros. I'm having trouble running the face detection node and am getting the error below:</p>
  
  <pre><code>arun@arun-Aspire-V5-121:~$ source /usr/share/setup.launch
  arun@arun-Aspire-V5-121:~$ source ./ws1/devel/setup.bash
  arun@arun-Aspire-V5-121:~$ rosrun exp2 face.py
  Traceback (most recent call last):
    File "/home/arun/ws1/src/exp2/scripts/face.py", line 4, in &lt;module&gt;
      roslib.load_manifest('rosopencv')
    File "/opt/ros/indigo/lib/python2.7/dist-packages/roslib/launcher.py", line 62, in load_manifest
      sys.path = _generate_python_path(package_name, _rospack) + sys.path
    File "/opt/ros/indigo/lib/python2.7/dist-packages/roslib/launcher.py", line 93, in _generate_python_path
      m = rospack.get_manifest(pkg)
    File "/usr/lib/python2.7/dist-packages/rospkg/rospack.py", line 164, in get_manifest
      return self._load_manifest(name)
    File "/usr/lib/python2.7/dist-packages/rospkg/rospack.py", line 208, in _load_manifest
      retval = self._manifests[name] = parse_manifest_file(self.get_path(name), self._manifest_name, rospack=self)
    File "/usr/lib/python2.7/dist-packages/rospkg/rospack.py", line 200, in get_path
      raise ResourceNotFound(name, ros_paths=self._ros_paths)
  rospkg.common.ResourceNotFound: rosopencv
  ROS path [0]=/opt/ros/indigo/share/ros
  ROS path [1]=/home/arun/ws1/src
  ROS path [2]=/opt/ros/indigo/share
  ROS path [3]=/opt/ros/indigo/stacks
  </code></pre>