tum_simulator
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could not get ardrone_navdata
When I try to get the navigation info, while running the simulator, as
The navigation info
rostopic echo /ardrone/navdata
I seem to get the following error in the terminal.
ERROR: Cannot load message class for [ardrone_autonomy/Navdata]. Are your messages built?
I am able to get the sonar height information using, rostopic echo /sonar_height