ros gazebo 仿真报错 exit code 134

出现类似下面的错误

[gazebo-2] process has died [pid 106436, exit code 134, cmd /opt/ros/indigo/lib/gazebo_ros/gzserver -e ode /home/math/ros_ws/src/baxter_simulator/baxter_gazebo/worlds/baxter.world __name:=gazebo __log:=/home/math/.ros/log/64bfbe4e-d1e0-11e8-9fdc-000c29421309/gazebo-2.log].
log file: /home/math/.ros/log/64bfbe4e-d1e0-11e8-9fdc-000c29421309/gazebo-2*.log
Aborted (core dumped)
[gazebo_gui-3] process has died [pid 106440, exit code 134, cmd /opt/ros/indigo/lib/gazebo_ros/gzclient __name:=gazebo_gui __log:=/home/math/.ros/log/64bfbe4e-d1e0-11e8-9fdc-000c29421309/gazebo_gui-3.log].
log file: /home/math/.ros/log/64bfbe4e-d1e0-11e8-9fdc-000c29421309/gazebo_gui-3*.log

网上很多说法都是瞎说。什么killall肯本没这个指令。

据我所知有两种可能：
1、同时运行了两个gazebo冲突了，Ctrl+C掉一个终端即可。
2、犯了低级错误，保存世界时没有加.world后缀。