rosmsg wont show message??

generate_messages

asked 2015-01-30 11:39:50 -0500

215
156 ●42 ●50 ●63

I at moment trying to learn about ROS using the guide provided by this page. Up until now it has been running fine, but for some reason i am not getting the same output as i was supposed to here

http://wiki.ros.org/ROS/Tutorials/CreatingMsgAndSrv#Using_rosmsg

The output i receive is this

Unable to load msg [beginner_tutorials/Num]: Cannot locate message [Num]: unknown package [beginner_tutorials] on search path [{'rosconsole': ['/opt/ros/indigo/share/rosconsole/msg'], 'catkin': ['/opt/ros/indigo/share/catkin/msg'], 'angles': ['/opt/ros/indigo/share/angles/msg'], 'image_view': ['/opt/ros/indigo/share/image_view/msg'], 'carrot_planner': ['/opt/ros/indigo/share/carrot_planner/msg'], 'urdf': ['/opt/ros/indigo/share/urdf/msg'], 'rosgraph': ['/opt/ros/indigo/share/rosgraph/msg'], 'rqt_py_console': ['/opt/ros/indigo/share/rqt_py_console/msg'], 'nodelet_topic_tools': ['/opt/ros/indigo/share/nodelet_topic_tools/msg'], 'rqt_graph': ['/opt/ros/indigo/share/rqt_graph/msg'], 'rotate_recovery': ['/opt/ros/indigo/share/rotate_recovery/msg'], 'theora_image_transport': ['/opt/ros/indigo/share/theora_image_transport/msg'], 'rocon_python_comms': ['/opt/ros/indigo/share/rocon_python_comms/msg'], 'qt_gui': ['/opt/ros/indigo/share/qt_gui/msg'], 'filters': ['/opt/ros/indigo/share/filters/msg'], 'ecl_exceptions': ['/opt/ros/indigo/share/ecl_exceptions/msg'], 'navfn': ['/opt/ros/indigo/share/navfn/msg'], 'dwa_local_planner': ['/opt/ros/indigo/share/dwa_local_planner/msg'], 'rosgraph_msgs': ['/opt/ros/indigo/share/rosgraph_msgs/msg'], 'smclib': ['/opt/ros/indigo/share/smclib/msg'], 'ecl_devices': ['/opt/ros/indigo/share/ecl_devices/msg'], 'rocon_gateway_utils': ['/opt/ros/indigo/share/rocon_gateway_utils/msg'], 'roscpp_serialization': ['/opt/ros/indigo/share/roscpp_serialization/msg'], 'rqt_rviz': ['/opt/ros/indigo/share/rqt_rviz/msg'], 'rosbuild': ['/opt/ros/indigo/share/rosbuild/msg'], 'qt_gui_cpp': ['/opt/ros/indigo/share/qt_gui_cpp/msg'], 'rosauth': ['/opt/ros/indigo/share/rosauth/msg'], 'tf': ['/opt/ros/indigo/share/tf/msg'], 'rqt_publisher': ['/opt/ros/indigo/share/rqt_publisher/msg'], 'roslang': ['/opt/ros/indigo/share/roslang/msg'], 'geometric_shapes': ['/opt/ros/indigo/share/geometric_shapes/msg'], 'kobuki_driver': ['/opt/ros/indigo/share/kobuki_driver/msg'], 'smach_ros': ['/opt/ros/indigo/share/smach_ros/msg'], 'genlisp': ['/opt/ros/indigo/share/genlisp/msg'], 'map_server': ['/opt/ros/indigo/share/map_server/msg'], 'interactive_markers': ['/opt/ros/indigo/share/interactive_markers/msg'], 'dynamic_reconfigure': ['/opt/ros/indigo/share/dynamic_reconfigure/msg'], 'ecl_containers': ['/opt/ros/indigo/share/ecl_containers/msg'], 'diagnostic_aggregator': ['/opt/ros/indigo/share/diagnostic_aggregator/msg'], 'ecl_license': ['/opt/ros/indigo/share/ecl_license/msg'], 'smart_battery_msgs': ['/opt/ros/indigo/share/smart_battery_msgs/msg'], 'robot_state_publisher': ['/opt/ros/indigo/share/robot_state_publisher/msg'], 'visualization_msgs': ['/opt/ros/indigo/share/visualization_msgs/msg'], 'diagnostic_updater': ['/opt/ros/indigo/share/diagnostic_updater/msg'], 'ecl_streams': ['/opt/ros/indigo/share/ecl_streams/msg'], 'resource_retriever': ['/opt/ros/indigo/share/resource_retriever/msg'], 'rqt_topic': ['/opt/ros/indigo/share/rqt_topic/msg'], 'smach': ['/opt/ros/indigo/share/smach/msg'], 'ecl_mpl': ['/opt/ros/indigo/share/ecl_mpl/msg'], 'stdr_parser': ['/opt/ros/indigo/share/stdr_parser/msg'], 'ecl_math': ['/opt/ros/indigo/share/ecl_math/msg'], 'rqt_action': ['/opt/ros/indigo/share/rqt_action/msg'], 'rqt_top': ['/opt/ros/indigo/share/rqt_top/msg'], 'rosbridge_server': ['/opt/ros/indigo/share/rosbridge_server/msg'], 'diagnostic_msgs': ['/opt/ros/indigo/share/diagnostic_msgs/msg'], 'move_base': ['/opt/ros/indigo/share/move_base/msg'], 'rosboost_cfg': ['/opt/ros/indigo/share/rosboost_cfg/msg'], 'genmsg': ['/opt/ros/indigo/share/genmsg/msg'], 'xacro': ['/opt/ros/indigo/share/xacro/msg'], 'turtle_tf2': ['/opt/ros/indigo/share/turtle_tf2/msg'], 'rqt_robot_dashboard': ['/opt/ros/indigo/share/rqt_robot_dashboard/msg'], 'pluginlib': ['/opt/ros ...

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answered 2015-01-30 12:18:20 -0500

ahendrix

47576 ●179 ●367 ●662 http://namniart.com/

It looks like the ROS tools can't find your beginner_tutorials package.

You should make sure that you've sourced the devel/setup.bash in your workspace
You should make sure that your package is named beginner_tutorials
You can check that ROS can find your package with rospack find beginner_tutorials

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It will not rospack find the package/directory eventhoug it inside of it. i tried source devel/setup.bash it just say that such file doesn't exist.

215 ( 2015-01-30 12:38:52 -0500 )edit

Is your package in a catkin workspace? The devel folder should be in the top level of your workspace, and the setup.bash should be generated when you run catkin_make.

ahendrix ( 2015-02-02 12:11:35 -0500 )edit

workspace is made by using catkin_init_workspace, and catkin_make. I have been getting the right output from the previous sections of the tutorials... But this section doesn't seem to be correct..

215 ( 2015-02-03 11:21:18 -0500 )edit

i don't know if it help but here is my workspace.. My workspace is given here.. https://www.dropbox.com/s/dud6uwhmmxf...

215 ( 2015-02-03 13:18:19 -0500 )edit

You have two copies of the beginner_tutorials package in your workspace; one at the top level (wrong) and one inside the src folder (right). ROS cannot find any packages that exist outside of the src folder in your workspace.

ahendrix ( 2015-02-03 16:44:36 -0500 )edit

exactly... Problem fixed.

215 ( 2015-02-03 17:13:52 -0500 )edit

Please explain what was the cause of the problem in detail. Your dropbox is not available anymore