rplidar exit code -6

[GH1413]

Hi, when i was trying to run the launch node of rp lidar, I get this error:
[rplidarNode-2] process has died [pid 10763, exit code -6, cmd /home/aero/aero/catkin_ws/devel/lib/rplidar_ros/rplidarNode __name:=rplidarNode __log:=/home/aero/.ros/log/f69ea2a8-01bb-11ed-9d21-1cbfcef0d4a6/rplidarNode-2.log].
log file: /home/aero/.ros/log/f69ea2a8-01bb-11ed-9d21-1cbfcef0d4a6/rplidarNode-2*.log

Any help please,thanks