# Explore surrounding areas and make a map

Hey, I am trying to do this task link: link text, but I got the following errors

eldiwiny@eldiwiny-HP-2000-Notebook-PC:~$roslaunch mrp2_navigation gmapping_demo.launch [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 edit retag close merge delete ## 1 Answer Sort by » oldest newest most voted Hi Marwa, Did you try sourcing your workspace? $ source ~/YOUR_WORKSPACE/devel/setup.bash


After that you could be able to roscd to mrp2_navigation package.

\$ roscd mrp2_navigation/

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