cannot launch node of type [object_slam/object_slam_node]

[shuzhangshu]

ERROR: cannot launch node of type [object_slam/object_slam_node]: Cannot locate node of type [object_slam_node] in package [object_slam]. Make sure file exists in package path and permission is set to executable (chmod +x)
I completely follow the steps of the author. But in the end, an error was reported during the runtime, and the object could not be found_ slam_ node。 I just found that when running "catkin_make", it did not show that the generated object_ slam_ Node, and ros_ Mono et al. Excuse me, are there any solutions