"mrp2_gazebo.launch" from mrp2_gazebo package error

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I'm working on mrp2_navigation/Tutorials and when i try to run the command

roslaunch mrp2_gazebo mrp2_gazebo.launch

from "Explore surrounding areas and make a map" it gives the error

Invalid roslaunch XML syntax: [Errno 2] No such file or directory: u'/opt/ros/indigo/share/mrp2_description/launch/description.launch'

because it makes a call to description.launch file from mrp2_description package but it doesn't exist.

Hope you fix this problem so people can complete the tutorial successfully.

Thanks.