qiu zu wei shen me cuo le

process[rviz-3]: started with pid [13068]
QMetaObject::invokeMethod: No such method QMenuBar::aboutToShow()
Error, operation time out.
[rplidarNode-2] process has died [pid 13040, exit code 255, cmd /home/zj/catkin_ws/devel/lib/rplidar_ros/rplidarNode __name:=rplidarNode __log:=/home/zj/.ros/log/7f1b5f04-87af-11e7-a6a3-085700034a05/rplidarNode-2.log].
log file: /home/zj/.ros/log/7f1b5f04-87af-11e7-a6a3-085700034a05/rplidarNode-2*.log
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