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[Erratic Robot] unable to launch this package!

asked 2013-06-14 09:52:59 -0600

Gazer gravatar image

updated 2013-06-14 12:18:03 -0600

Hi all

I am looking to launch the erratic robot I downloaded from (Am I using the outdated package?)

sudo apt-get install ros-groovy-erratic-robot

then execute:

roslaunch erratic_navigation_apps demo_2dnav_slam.launch

But I got the following errorS from gazebo:

 Error [] XML Element[filename], child of element[mesh] not defined in SDF. Ignoring.[mesh]

    Error [] Error reading element <mesh>

    Error [] Error reading element <geometry>

    Error [] Error reading element <collision>

    Error [] Error reading element <link>

    Error [] Error reading element <model>

    Error [] Error reading element <world>

    Error [] Unable to read element <sdf>

    Error:   Could not find the 'robot' element in the xml file

             at line 59 in /tmp/buildd/ros-groovy-urdfdom-0.2.7-0precise-20130326-0224/urdf_parser/src/model.cpp

    Error [] Unable to call parseURDF on robot model

    Warning [] SDF has no <sdf> element in file[urdf file]

    Error [] parse as old urdf model file failed.

    Error [] Unable to read sdf file[/opt/ros/groovy/stacks/simulator_gazebo/gazebo_worlds/worlds/]

    Segmentation fault (core dumped)

    [gazebo-1] process has died [pid 19218, exit code 139, cmd /opt/ros/groovy/stacks/simulator_gazebo/gazebo/scripts/gazebo -u /opt/ros/groovy/stacks/simulator_gazebo/gazebo_worlds/worlds/ __name:=gazebo __log:=/home/dijia/.ros/log/1e527878-d52b-11e2-83e6-d0df9ada3503/gazebo-1.log].

    log file: /home/abc/.ros/log/1e527878-d52b-11e2-83e6-d0df9ada3503/gazebo-1*.log
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2 Answers

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answered 2013-12-12 00:44:37 -0600

Vegeta gravatar image

updated 2013-12-12 01:06:21 -0600

You need to also parse the robot model and spawn it into gazebo . Try other launch files in the gazebo apps package. There should be a move_base launch file. If you have your own urdf file, you can use it instead.

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Hi, could you provide some detailed advice on parsing the robot model and spawn it into gazebo? For instance, in which package? how to parse the robot model? thanks!

Lili Meng gravatar image Lili Meng  ( 2013-12-16 07:40:20 -0600 )edit

Do you have a xacro file and a urdf model for your own robot? In your launch file you have to include the robot description and joint state publisher. Check gazebo tutorials on how to build your own model and to spawn it in the gazebo. Its pretty straight forward if you understood tf.

Vegeta gravatar image Vegeta  ( 2013-12-17 02:45:48 -0600 )edit

answered 2013-12-11 16:41:42 -0600


 I have the same problem with you! Have you solved this problem now? Thanks!
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Asked: 2013-06-14 09:52:59 -0600

Seen: 1,931 times

Last updated: Dec 12 '13