When I run this command：
roslaunch structure_core_ros_driver sc_rviz.launch
The following problems occurred：
[ INFO] [1580916862.678079741]: Loading nodelet /sc_nodelet of type structure_core/Driver to manager sc_node with the following remappings:
[FATAL] [1580916862.684775572]: Failed to load nodelet ‘/sc_nodelet
[ERROR] [1580916862.780633771]: Failed to find nodelet with name ‘/sc_nodelet’ to unload.
[sc_nodelet-5] process has died [pid 23680, exit code 255, cmd /opt/ros/kinetic/lib/nodelet/nodelet load structure_core/Driver sc_node __name:=sc_nodelet __log:=/home/ahao/.ros/log/fab7d382-482c-11ea-bed9-bc307d9434db/sc_nodelet-5.log].
log file: /home/ahao/.ros/log/fab7d382-482c-11ea-bed9-bc307d9434db/sc_nodelet-5*.log
[ERROR] [1580916863.094780460]: Failed to find nodelet with name ‘/sc_PointCloudXyzNodelet’ to unload.
[ERROR] [1580916863.095333647]: Failed to find nodelet with name ‘/sc_PointCloudXyzrgbNodelet’ to unload.