i am trying to plan and execute the pr2 robot arm using indigo. from moveit setup assistant i generated all the files. to "Configure MoveIt! For Control With The PR2 Set ROSPACKAGEPATH"

i tried

cd catkin_ws
export ROS_PACKAGE_PATH=$PWD:$ROS_PACKAGE_PATH 

kindly explain if any error.

Created Planning and Execution launch file in the same folder but while running

roslaunch pr2_moveit_generated moveit_planning_execution.launch

shows error

[moveit_planning_execution.launch] is neither a launch file in package [pr2_moveit_generated] nor is [pr2_moveit_generated] a launch file name
The traceback for the exception was written to the log file

Location: /home/drivesn/catkin_ws/src where the pr2_moveit_generated folder is located.

Suggest if any other commands to source to the exact location or the reason behind the error.