roslaunch camera.launch error on zr300

[ynfei]

when i using :roslaunch realsense_ros_camera camera.launch,it show these errors:

[ERROR] [1515018799.819414055]: Failed to load nodelet [/realsense_ros_camera] of type [realsense_ros_camera/NodeletCamera] even after refreshing the cache: Could not find library corresponding to plugin realsense_ros_camera/NodeletCamera. Make sure the plugin description XML file has the correct name of the library and that the library actually exists.
[ERROR] [1515018799.819458645]: The error before refreshing the cache was: Could not find library corresponding to plugin realsense_ros_camera/NodeletCamera. Make sure the plugin description XML file has the correct name of the library and that the library actually exists.
[FATAL] [1515018799.819612916]: Failed to load nodelet '/realsense_ros_cameraof typerealsense_ros_camera/NodeletCamerato managerrealsense_ros_camera_manager'
[realsense_ros_camera-3] process has died [pid 20593, exit code 255, cmd /opt/ros/kinetic/lib/nodelet/nodelet load realsense_ros_camera/NodeletCamera realsense_ros_camera_manager --no-bond __name:=realsense_ros_camera __log:=/home/xiaofeifei/.ros/log/191e05c2-f0d6-11e7-bfa4-20898494de10/realsense_ros_camera-3.log].
log file: /home/xiaofeifei/.ros/log/191e05c2-f0d6-11e7-bfa4-20898494de10/realsense_ros_camera-3*.log
how can i solve it,thanks in advance!