Hi again, I am having this problem when I try to launch a project: nicolas@blanc:/$ roslaunch han_Planner Planner.launch scenario:=hallway launch_rviz:=true no_window:=true ... logging to /home/nicolas/.ros/log/07e688d4-e6a1-11df-ac50-001aa02eaaa8/roslaunch-blanc-1774.log Checking log directory for disk usage. This may take awhile. Press Ctrl-C to interrupt Done checking log file disk usage. Usage is <1GB. started roslaunch server http://blanc:35324/ SUMMARY ======== PARAMETERS * /pr2_controller_manager/joint_state_publish_rate * /use_sim_time * /robot_description * /robot_state_publisher/publish_frequency * /pr2_controller_manager/mechanism_statistics_publish_rate * /walls * /robot_state_publisher/tf_prefix NODES / gazebo (gazebo/gazebo) xml2factor_walls (gazebo/spawn_model) tf_footprint_base (tf/static_transform_publisher) tf_odom_map (tf/static_transform_publisher) tf_caster_box_support (tf/static_transform_publisher) tf_left_wheel (tf/static_transform_publisher) tf_right_wheel (tf/static_transform_publisher) tf_caster_wheel (tf/static_transform_publisher) map_server (map_server/map_server) spawn_erratic (gazebo_tools/gazebo_model) robot_state_publisher (robot_state_publisher/state_publisher) pr2_mechanism_diagnostics (pr2_mechanism_diagnostics/pr2_mechanism_diagnostics) fake_joint_calibration (rostopic/rostopic) diffdrive (gazebo_plugins/gazebo_ros_diffdrive) run_scene (han_Scene/run_scene) rviz (rviz/rviz) Planner_Client (han_Planner/client) Planner_Server (han_Planner/server) Planner_Control (han_Planner/control) starting new master (master configured for auto start) process[master]: started with pid [1791] ROS_MASTER_URI=http://blanc:11311/ setting /run_id to 07e688d4-e6a1-11df-ac50-001aa02eaaa8 process[rosout-1]: started with pid [1804] started core service [/rosout] process[gazebo-2]: started with pid [1813] process[xml2factor_walls-3]: started with pid [1818] process[tf_footprint_base-4]: started with pid [1820] process[tf_odom_map-5]: started with pid [1821] process[tf_caster_box_support-6]: started with pid [1823] process[tf_left_wheel-7]: started with pid [1834] Gazebo multi-robot simulator, version 0.10.0 Part of the Player/Stage Project [http://playerstage.sourceforge.net]. Copyright (C) 2003 Nate Koenig, Andrew Howard, and contributors. Released under the GNU General Public License. process[tf_right_wheel-8]: started with pid [1840] process[tf_caster_wheel-9]: started with pid [1848] process[map_server-10]: started with pid [1855] process[spawn_erratic-11]: started with pid [1860] process[robot_state_publisher-12]: started with pid [1867] process[pr2_mechanism_diagnostics-13]: started with pid [1873] process[fake_joint_calibration-14]: started with pid [1875] process[diffdrive-15]: started with pid [1891] process[run_scene-16]: started with pid [1895] process[rviz-17]: started with pid [1906] ERROR: cannot launch node of type [han_Planner/client]: Cannot locate node of type [client] in package [han_Planner] ERROR: cannot launch node of type [han_Planner/server]: Cannot locate node of type [server] in package [han_Planner] ERROR: cannot launch node of type [han_Planner/control]: Cannot locate node of type [control] in package [han_Planner] The weird thing is that the actionlib package is already made and han_Planner also. Any idea?? Thanks Nicolas