The ROS Wiki is for ROS 1. Are you using ROS 2 (Humble, Iron, or Rolling)? Check out the ROS 2 Project DocumentationPackage specific documentation can be found on index.ros.org
See also py_trees, py_trees_ros, py_trees_msgs
Wiki: rqt_py_trees (last edited 2017-03-26 01:03:27 by DanielStonier)