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ERROR while loading gazebo

Hi there,

I was trying to load gazebo with a world file. But it gives following error and exits.

[Err] [Diff.cc:41] Diff plugin missing <left_joint> element
[Err] [Diff.cc:44] Diff plugin missing <right_joint> element
Error [Element.cc:671] Missing element description for [right_joint]
gzserver: /usr/include/boost/smart_ptr/shared_ptr.hpp:648: typename boost::detail::sp_member_access<t>::type boost::shared_ptr<t>::operator->() const [with T = sdf::Element; typename boost::detail::sp_member_access<t>::type = sdf::Element*]: Assertion `px != 0' failed.
Aborted


In the world file I've specified left_element and right_element. Why this is happening?
Also, what is meant by Missing element description for [right_joint]? I didn't find any description for joints anywhere. Can anyone provide a solution for this?

Files:
1. World file
2. Model.sdf
3. Model.config
4. Plugin

Thanks in advance!

ERROR while loading gazebo

Hi there,

I was trying to load gazebo with a world file. But it gives following error and exits.

[Err] [Diff.cc:41] Diff plugin missing <left_joint> element
[Err] [Diff.cc:44] Diff plugin missing <right_joint> element
Error [Element.cc:671] Missing element description for [right_joint]
gzserver: /usr/include/boost/smart_ptr/shared_ptr.hpp:648: typename boost::detail::sp_member_access<t>::type boost::shared_ptr<t>::operator->() const [with T = sdf::Element; typename boost::detail::sp_member_access<t>::type = sdf::Element*]: Assertion `px != 0' failed.
Aborted


In the world file I've specified left_element and right_element. Why this is happening?
Also, what is meant by Missing element description for [right_joint]? I didn't find any description for joints anywhere. Can anyone provide a solution for this?

Files:
1. World file
2. Model.sdf
3. Model.config
4. Plugin

Thanks in advance!