Running Turtlebot_gazebo error [closed]

asked 2016-10-10 08:23:06 -0500

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I'm trying to run turtlebot_gazebo but I have some problems. Here's the subject in details. I'm running ROS kinetic which is supposed that it can't link to gazebo as far as I know. I installed gazebo with the help of your site, however, the package I got and installed was called turtlebot_simulator, and turtlebot_gazebo was inside it (if I misunderstood the thing let me know). I tried to launch it using " $ roslaunch turtlebot_gazebo turtlebot_world.launch" but this didn't work. Finally, I browsed to folder "launch" inside turtlebot_gazebo and tried to launch it using "$ roslaunch turtlebot_world.launch" and it gives me the following error:

Invalid <arg> tag: environment variable 'TURTLEBOT_GAZEBO_WORLD_FILE' is not set.

Arg xml is <arg default="$(env TURTLEBOT_GAZEBO_WORLD_FILE)" name="world_file"/> The traceback for the exception was written to the log file

how can I fix it? Thank you

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Closed for the following reason duplicate question by 130s
close date 2017-09-15 11:52:51.201018

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Duplicate.

130s ( 2017-09-15 11:53:04 -0500 )edit

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answered 2017-03-03 05:20:53 -0500

Vash
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Try setting the variable TURTLEBOT_GAZEBO_WORLD_FILE:

export TURTLEBOT_GAZEBO_WORLD_FILE="/opt/ros/indigo/share/turtlebot_gazebo/worlds/playground.world"

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answered 2016-10-10 09:17:42 -0500

gavran
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The error you got says that environment variable is not set - this means that this launch file expected that TURTLEBOT_GAZEBO_FILE would be set. (to check it, try echo $TURTLEBOT_GAZEBO_WORLD_FILE).

I suggest you to install turtlebot_gazebo package by running sudo apt-get install ros-kinetic-turtlebot-gazebo and then try to launch it as you did initially (roslaunch turtlebot_gazebo turtlebot_world)

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I used your command and I installed it. The good point is that roslaunch turtlebot_gazebo turtlebot_world.launch worked, however, it gives same error! what does it mean "the file would be set"?

Mina ( 2016-10-10 09:55:32 -0500 )edit

the variable would be set - I meant to say it would have some value. To be sure, can you open a new terminal and write echo $TURTLEBOT_GAZEBO_WORLD_FILE (ant tell what do you get as an output)

gavran ( 2016-10-10 10:06:41 -0500 )edit

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The problem was that I neither restarted the PC nor ROS in 3 days now, so even after I installed turtlebot_gazebo 1st time the changes weren't applied. Now I restarted it so it worked. Sorry for that. It looks really nice Do you have any idea how I can simulate drones same way? Thank you

Mina ( 2016-10-10 10:37:20 -0500 )edit

no - but I suggest you to put this as separate question (maybe somebody knows who doesn't follow our discussion in comments) and mark this one as resolved.

gavran ( 2016-10-10 11:26:54 -0500 )edit

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In my case, the problem with TURTLEBOT_GAZEBO_WORLD_FILE fixed just by reboot my computer. But there are another problems. Fortunately there is a good solution in http://answers.ros.org/question/19940...