Error when starting navigation unit 3

lfernandez · January 19, 2021, 6:34pm

Hi everyone
When trying to start the navigation I get the following error

Have I made any mistake by following the exercises steps?
Thanks in advance

bayodesegun · January 20, 2021, 8:32am

Hi Laura,

Looks like there’s a problem with the instructions causing this error. Try removing this line from your start_navigation.launch file:

<!-- Turtlebot3 -->
  <include file="$(find turtlebot3_bringup)/launch/turtlebot3_remote.launch" />

This file is being included twice in start_navigation.launch, because it’s included by start_localization.launch, which is also included in start_navigation.launch.

turtlebot3_remote.launch contains the node /robot_state_publisher. Therefore, if it’s included more than once, this node will be replicated and will generate this kind of error.

We’ll fix this error in the notebook.

lfernandez · January 21, 2021, 7:18am

Thanks again @bayodesegun!!

lfernandez · January 23, 2021, 11:50am

Hi, @bayodesegun

I continue with the same error although I’ve comment the line…
Thanks again

albertoezquerro · January 25, 2021, 8:31am

Hello @lfernandez ,

Now the error is telling you that you are launching the map_server node multiple times. You are launching it inside this launch file (lines 8 to 10) and probably also inside the start_localization.launch. So you should remove (or comment) one of them.

Best,