Cannot launch Gazebo world about ros2learn HOT 5 CLOSED

You need gazebo 9.9.0 . The easiest way would be to get rid of ros-dashing-gazebo* and install gazebo via one liner installation: curl -sSL http://get.gazebosim.org | sh.

Once you have the latest version, make sure you follow gym-gazebo2 installation instructions from the master branch. https://github.com/AcutronicRobotics/gym-gazebo2/blob/master/INSTALL.md.

In case you install gazebo 9.9.0 and still get the reset_simulation service not available ...
In the create workspace step, you will see that you must obtain the packages in additional-repos.repos file, and that is were gazebo_ros_pkgs gets from in the master installation (ROS2 Dashing).

@YueErro @rkojcev I believe we should update the instructions in master/dashing branches to get gazebo via the one liner instruction, same as we do in the dockerfiles (ci and dev). Are you okay with this?

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Just pasting the error here so everybody can arrive to this issue easily by searching it.

gzclient: /build/ogre-1.9-B6QkmW/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreNode.cpp:630: virtual void Ogre::Node::setScale(const Ogre::Vector3&): Assertion `!inScale.isNaN() && "Invalid vector supplied as parameter"' failed.

This error is because Gazebo 9.0.0 does not allow you to use dummy links with radius = 0.0, and we use those dummy links in MARA. Here is the explanation on how to hack this: AcutronicRobotics/gym-gazebo2#31 (comment)

I agree @nzlz we should add gazebo 9.9.0 one-liner installation to the instructions.

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Installing gazebo 9.9.0 worked! Thank you :)

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Which branch instructions did you follow? master/dashing/crystal..

Which gazebo version do you have? gazebo -v

Also, could you provide a more extended error trace?

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I followed the master branch's instructions.

My gazebo version is 9.0.0.

Here is a more extended error trace:

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