ERROR: cannot launch node of type

[qingchunlizhi]

when I run this commend: roslaunch automow_simulation2d simple_simulation.launch ,I get this error

SUMMARY

PARAMETERS

• /map_polygon/field_csv_file: /home/duan/catkin...
• /map_polygon/field_frame_id: odom
• /rosdistro: kinetic
• /rosversion: 1.12.14
• /use_sim_time: 1

NODES
/
map_polygon (automow_planning/map_polygon.py)
stageros (stage/stageros)

ROS_MASTER_URI=http://localhost:11311

ERROR: cannot launch node of type [stage/stageros]: can't locate node [stageros] in package [stage]
ERROR: cannot launch node of type [automow_planning/map_polygon.py]: can't locate node [map_polygon.py] in package [automow_planning]
No processes to monitor

can you help me? Thanks!