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ERROR: cannot launch node of type [controller_manager/controller_manager]: can't locate node [controller_manager] in package [controller_manager]

Hi all. I installed the university_robot package and roslaunch ur_gazebo ur10.launch but there is an error output:

`ERROR: cannot launch node of type [controller_manager/controller_manager]: can't locate node [controller_manager] in package [controller_manager]

ERROR: cannot launch node of type [controller_manager/controller_manager]: can't locate node [controller_manager] in package [controller_manager]

I runrosservice list | grep controller_manager` the output is

`/controller_manager/list_controller_types
/controller_manager/list_controllers
/controller_manager/load_controller
/controller_manager/reload_controller_libraries
/controller_manager/switch_controller
/controller_manager/unload_controller

`I have installed the controller_manager. Could someone give me some advice?Thanks.