Gazebo for two launch files cannot simultaneously run? [gazebo-1 error]

Issue #2596 invalid
Anthony Humay
created an issue

I am just trying to make a map and navigate it in the Gazebo. I am running Ubuntu 15.10 and ROS Kinetic. I run these in separate terminal windows:

roslaunch turtlebot_gazebo turtlebot_world.launch

roslaunch turtlebot_gazebo gmapping_demo.launch

roslaunch turtlebot_rviz_launchers view_navigation.launch

roslaunch kobuki_keyop keyop.launch

But I my kobuki_keyop does not work, giving me:

[ WARN] [1550005269.894992827]: KeyOp: could not connect, trying again after 500ms...
[ERROR] [1550005270.400225747]: KeyOp: could not connect.
[ERROR] [1550005270.400604286]: KeyOp: check remappings for enable/disable topics).

I then check the roslaunch turtlebot_gazebo turtlebot_world.launch terminal window, and see the following error:

gzserver: /build/ogre-1.9-VJX7tp/ogre-1.9-1.9.0+dfsg1/OgreMain/src/OgreRenderSystem.cpp:546: virtual void Ogre::RenderSystem::setDepthBufferFor(Ogre::RenderTarget*): Assertion `bAttached && "A new DepthBuffer for a RenderTarget was created, but after creation" "it says it's incompatible with that RT"' failed.
Aborted (core dumped)

[gazebo-1] process has died [pid 5190, exit code 134, cmd /opt/ros/kinetic/lib/gazebo_ros/gzserver -e ode /opt/ros/kinetic/share/turtlebot_gazebo/worlds/playground.world __name:=gazebo __log:=/home/tony15/.ros/log/534c6c66-2ef1-11e9-854a-080027d85737/gazebo-1.log].
log file: /home/tony15/.ros/log/534c6c66-2ef1-11e9-854a-080027d85737/gazebo-1*.log

Upon further inspection, it seems that if I roslaunch turtlebot_gazebo turtlebot_world.launch, then as soon as I roslaunch turtlebot_gazebo gmapping_demo.launch, the turtlebot_world.launch receives the previous error (which then explains why the kobuki_keyop doesn't work).
turtlebot_world.launch works completely fine on it's own.

turtlebot_world.launch and kobuki_keyop work fine when both running.

Does anyone know why my turtlebot_world.launch and gmapping_demo.launch / turtlebot_rviz_launchers can't seem to run at the same time? The main turtlebot_gazebo for turtlebot_world will just get that error seemingly randomly when one of those other two run.

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