ur3 real robot execute failed

[chiawenwang]

I just finished the setup and use the code below:
'roslaunch ur_robot_driver ur3_bringup.launch robot_ip:=192.168.56.10 limited:=ture'
'roslaunch ur3_moveit_config ur3_moveit_planning_execution.launch limited:=true'
'roslaunch ur3_moveit_config moveit_rviz.launch rviz_config:=$(rospack find ur3_moveit_config)/launch/moveit.rviz'

but it failed when executed

It also failed in gazebo.