"gzserver: symbol lookup error" (not ignition problem) when launching Gazebo v9.19 in Ubuntu 18.04
When I try to launch the Gazebo from terminal;
gazebo --verbose
Gazebo multi-robot simulator, version 9.19.0 Copyright (C) 2012 Open Source Robotics Foundation. Released under the Apache 2 License. http://gazebosim.org
Gazebo multi-robot simulator, version 9.19.0 Copyright (C) 2012 Open Source Robotics Foundation. Released under the Apache 2 License. http://gazebosim.org
[Msg] Waiting for master.
[Msg] Waiting for master.
[Msg] Connected to gazebo master @ http://127.0.0.1:11345
[Msg] Publicized address: 10.76.137.168
[Msg] Connected to gazebo master @ http://127.0.0.1:11345
[Msg] Publicized address: 10.76.137.168
[Msg] Loading world file [/usr/share/gazebo-9/worlds/empty.world]
gzserver: symbol lookup error: /usr/lib/x86_64-linux-gnu/libgazebo.so.9: undefined symbol: _ZN3sdf28recursiveSameTypeUniqueNamesESt10shared_ptrINS_7ElementEE
this error occurs. I really can't understand what is the meaning of this "undefined symbol". I don't now how can I fix this problem. (Also I'm using ROS melodic but I just can't launch Gazebo as you can see above so I don't know is it important.)
This looks like a version mismatch between gazebo and libsdformat. Can you tell me which version of libsdformat you have installed? You can do this with
apt-cache policy libsdformat6@azeey installed version of libsdformat6 is 6.2.0.1~bionic.