Explore surrounding areas and make a map

[marwa El diwiny]

Hey Folks,

I am newbie at ROS, and I want to make this example, but it gives me error

link:
http://wiki.ros.org/mrp2_navigation/Tutorials/Navigate%20in%20Simulation/Explore%20surrounding%20areas%20and%20make%20a%20map


[gmapping_demo.launch] is neither a launch file in package [mrp2_navigation] nor is [mrp2_navigation] a launch file name
The traceback for the exception was written to the log file

[David Lu!!]

I would recommend posting in ROS Answers or the Issues page for the repo. 

https://github.com/milvusrobotics/mrp2_common/issues

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