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spencer-project / spencer_people_tracking

Multi-modal ROS-based people detection and tracking framework for mobile robots developed within the context of the EU FP7 project SPENCER.
http://www.spencer.eu/
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Messages not being built. #33

Closed dmkarage closed 7 years ago

dmkarage commented 7 years ago

Hi,

after successfully launching the tracking_single_rgbd_sensor.launch, I try to echo the /spencer/perception/tracked_persons topic. I receive the following error:

ERROR: Cannot load message class for [spencer_tracking_msgs/TrackedPersons]. Are your messages built?

I know that this has to do either with CMakeLists.txt or the way that the package is built. I built the package as you recommend in the instructions. The CMakeLists.txt in the spencer_people_tracking/launch/spencer_people_tracking_launch looks like:

cmake_minimum_required(VERSION 2.8.3) project(spencer_people_tracking_launch)

find_package(catkin REQUIRED COMPONENTS)

The CMakeLists.txt in spencer_people_tracking/messages/spencer_tracking_msgs/ looks like:

cmake_minimum_required(VERSION 2.8.3) project(spencer_tracking_msgs)

find_package(catkin REQUIRED COMPONENTS roscpp roslib std_msgs geometry_msgs message_generation )

################################################

Declare ROS messages, services and actions

################################################

Generate messages in the 'msg' folder

add_message_files( FILES DetectedPerson.msg DetectedPersons.msg CompositeDetectedPerson.msg CompositeDetectedPersons.msg TrackedPerson.msg TrackedPersons.msg TrackedPerson2d.msg TrackedPersons2d.msg TrackedGroup.msg TrackedGroups.msg ImmDebugInfo.msg ImmDebugInfos.msg TrackingTimingMetrics.msg )

Generate services in the 'srv' folder

add_service_files( FILES GetPersonTrajectories.srv )

Generate added messages and services with any dependencies listed here

generate_messages( DEPENDENCIES geometry_msgs std_msgs )

###################################

catkin specific configuration

################################### catkin_package( CATKIN_DEPENDS roscpp std_msgs geometry_msgs message_runtime )

I did not change anything after building the package. My messages are not built even when I try to launch the tracking_on_robot.

What could be possibly wrong?

Thank you

tlind commented 7 years ago

Maybe you are just not source'ing the workspace properly, before running roslaunch or rostopic echo? That's actually one step which is missing from the README, I will add it.

dmkarage commented 7 years ago

After building I did "source devel/setup.bash" in my ~/workspaces/spencer_ws. I do not know if anything else is needed. Also when I try roscd in the spenser packages it works, which means that it is probably correctly sourced. In the rostopic list I can see the several topics, but when I do echo, i receive the missing msg error.

miguelcrf450 commented 7 years ago

dmkarage i have the same problem. Did you already resolved it? when i try echo the /spencer/perception/tracked_persons topic appears ERROR: Cannot load message class for [spencer_tracking_msgs/TrackedPersons]. Are your messages built?

dmkarage commented 7 years ago

miguelcrf450 built it as suggested in the readme by the guys (with catkin build) and then try to source devel/setup.bash in ALL the terminals that you use. Hope it works!