I'm trying to do the gmapping in gazebo tutorial found [here](http://wiki.ros.org/turtlebot_gazebo/Tutorials/indigo/Make%20a%20map%20and%20navigate%20with%20it) but I am getting an error with both my local and global costmaps.
The three launch files that I use are turtlebot_gazebo/world.launch, turtlebot_gazebo/gmapping.launch, and turtlebot_rviz_launchers/view_navigation.launch. When RVIZ shows up, I have an error in both the local and global costmaps which says "No map received" and "No transform from [] to [map]"
Does anyone know what I should do or where I should start to look?
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