roslaunch hector_quadrotor_teleop xbox_controller.launch ...when i enter the command the error will be
core service [/rosout] found ERROR: cannot launch node of type [joy/joy_node]: joy ROS path [0]=/opt/ros/indigo/share/ros ROS path [1]=/home/test/hector_quadrotor_tutorial/src ROS path [2]=/opt/ros/indigo/share ROS path [3]=/opt/ros/indigo/stacks