root@16c70afe2de2:~/mnlm/mnlm/robot/robot_arm_ws# colcon build --symlink-install ; source install/setup.bash ; ros2 launch robot_arm robot_arm.launch.py
Summary: 1 package finished [1.35s]
1 package had stderr output: robot_arm
file 'robot_arm.launch.py' was not found in the share directory of package 'robot_arm' which is at '/home/small-thinking/mnlm/mnlm/robot/robot_arm_ws/install/robot_arm/share/robot_arm'
root@16c70afe2de2:~/mnlm/mnlm/robot/robot_arm_ws# colcon build --symlink-install ; source install/setup.bash ; ros2 launch robot_arm robot_arm.launch.py Summary: 1 package finished [1.35s] 1 package had stderr output: robot_arm file 'robot_arm.launch.py' was not found in the share directory of package 'robot_arm' which is at '/home/small-thinking/mnlm/mnlm/robot/robot_arm_ws/install/robot_arm/share/robot_arm'
colcon build后 launch robot_arm robot_arm.launch.py 报错,这个问题要如何解决呢?