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ROS Groovy Gazebo cannot spawn objects

asked 2013-01-25 11:51:26 -0600

jys gravatar image

I am just trying to spawn objects and I have just copied two commands from tutorial: http://www.ros.org/wiki/simulatorgazebo/Tutorials/GazeboROSAPI Both give same exact errors. I have tried with multipe model files under gazeboworlds/objects/*.model but they all seems to give same errors below.

1.  rosrun gazebo spawn_model -file `rospack find gazebo_worlds`/objects/desk1.model -gazebo -model desk1 -x 0
2.  rosrun gazebo spawn_model -file `rospack find gazebo_worlds`/objects/000.580.67.model -gazebo -model cup -z 2

Warning [parser.cc:374] Gazebo SDF has no <gazebo> element in file[data-string]
[ERROR] [1358995976.958104948, 86.064000000]: Could not find the 'robot' element in the xml file
Error [parser_urdf.cc:1659] Unable to call parseURDF on robot model
Warning [parser.cc:374] Gazebo SDF has no <gazebo> element in file[urdf string]
Error [parser.cc:318] parse as old urdf model file failed.
Error [World.cc:1190] Unable to read sdf string

I am not able to spawn any objects that came with ROS Groovy. Are these model files outdated?

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I have a similar problem. The models should be fine, because Gazebo can load them from model directory or if they are embedded from world. It is juts spawn_model node of ROS that can't load the model. My question in ROS QA: http://answers.ros.org/question/52076/gazebo-sdf-model-loading-in-groovy/

r0nald gravatar imager0nald ( 2013-01-28 04:39:45 -0600 )edit

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answered 2013-01-25 15:10:14 -0600

nkoenig gravatar image

I just looked at the .model files in gazebo_worlds in groovy. They are all from Gazebo < 1.0, and are longer supported.

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Nate, while your attention is on SDF problems, have you seen this: http://answers.gazebosim.org/question/854/error-loading-sdf-in-gazebo-131/ ? There's a good workaround proposed, but I think the original problem stems from a bug.

Ben B gravatar imageBen B ( 2013-01-25 16:43:05 -0600 )edit

Okay. Why is none of the supported model files included in ROS Groovy? Accoridng to http://gazebosim.org/wiki/Tutorials/1.2/beginner/build_world Gazebo 1.2 documentation, it should have objects appear under "Insert" Tab, but none appears in ROS Gazebo.. Is this a known issue?

jys gravatar imagejys ( 2013-01-26 14:10:14 -0600 )edit

@ps for version 1.2.5 you can insert them if they are in ~/.gazebo/models folder, I couldn't manage to set the paths so they can be seen from other folders. Maybe it is fixed on newer versions.

AndreiHaidu gravatar imageAndreiHaidu ( 2013-01-28 04:31:12 -0600 )edit
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answered 2013-01-25 14:52:59 -0600

AndreiHaidu gravatar image

Those tutorials are outdated, depeding on which gazebo version you have (most probably 1.2.5 which comes with Groovy), you should use these tutorials.

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Asked: 2013-01-25 11:51:26 -0600

Seen: 1,426 times

Last updated: Jan 25 '13