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Cannot import custom rosmsg (actionlib)

asked 2019-12-17 08:03:43 -0500

Yehor gravatar image

updated 2019-12-17 08:58:29 -0500


I have very strange problem related to my custom action msg. I compiled my msg, but I can't import it. When I try to run my py action server I am getting next error:

raceback (most recent call last):
File "/home/ivan/infocom_robotics_ws/src/dock_station_goal/src/", line 5, in <module> from dock_station_goal.msg import DoTurnAction, DoTurnFeedback, DoTurnResult ImportError: No module named msg

But I can at the same time I can find my msg with: rosmsg list | grep DoTurn

ivan@ivan-desktop:~$ rosmsg list | grep DoTurn

dock_station_goal/DoTurnAction dock_station_goal/DoTurnActionFeedback dock_station_goal/DoTurnActionGoal dock_station_goal/DoTurnActionResult dock_station_goal/DoTurnFeedback dock_station_goal/DoTurnGoal dock_station_goal/DoTurnResult ivan@ivan-desktop:~$

Another strange thing is that when I am checking: rosmsg packages, the pkgs with my custom msgs are doubled:

ivan@ivan-desktop:~$ rosmsg packages

actionlib actionlib_msgs actionlib_tutorials base_local_planner beginner_tutorials beginner_tutorials bond control_msgs costmap_2d diagnostic_msgs dock_station_goal dock_station_goal dynamic_reconfigure geometry_msgs map_msgs move_base_msgs nav_msgs realsense2_camera robot_drive roscpp rosgraph_msgs rospy_tutorials rosserial_msgs sensor_msgs shape_msgs smach_msgs std_msgs stereo_msgs tf tf2_msgs trajectory_msgs turtle_actionlib turtlebot3_msgs turtlebot_msgs turtlesim visualization_msgs

You can see that beginner_tutorials and dock_station_goal are doubled

I am stack and getting crazy((( Can somebody help me?

Thank you!


I am using catkin_make, the output of $ROS_PACKAGE_PATH is:


And my Cmake list is:

cmake_minimum_required(VERSION 2.8.3) project(dock_station_goal)

find_package(catkin REQUIRED COMPONENTS message_generation
actionlib actionlib_msgs
move_base_msgs roscpp rospy
std_msgs genmsg )

add_action_files( DIRECTORY action FILES DoDocking.action
DoTurn.action )

generate_messages( DEPENDENCIES
std_msgs actionlib_msgs )

catkin_package( LIBRARIES dock_station_goal CATKIN_DEPENDS move_base_msgs roscpp rospy std_msgs actionlib_msgs DEPENDS system_lib
DEPENDS message_runtime )

${catkin_INCLUDE_DIRS} )



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Another weird thing is that I can import my msg from /home/usr/my_ws by running python! But I cant import from my_pkg/src

Yehor gravatar image Yehor  ( 2019-12-17 08:07:57 -0500 )edit

Could you please edit your post and provide the following information:

  • the CMakeLists.txt of your package (remove all comments, though),
  • the build tool you use (catkin_make or catkin_tools / catkin build)
  • the output of echo $ROS_PACKAGE_PATH
  • if possible, a link to your package source code (GitHub or similar)
mgruhler gravatar image mgruhler  ( 2019-12-17 08:44:00 -0500 )edit

@mgruhler I edited my post

Unfortunately I don't have this project on a github

Yehor gravatar image Yehor  ( 2019-12-17 08:59:54 -0500 )edit

1 Answer

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answered 2019-12-17 09:39:59 -0500

Yehor gravatar image

Sorry, it was my fail. I had the file with the same name as pkg in that folder and didn't notice that. Thank you for the response.

I will delete the question

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I will delete the question

I've undeleted your question, as it is a valid question.

The fact that it has a "trivial" answer does not change this.

I've also accepted your comment as the answer.

gvdhoorn gravatar image gvdhoorn  ( 2019-12-17 14:26:01 -0500 )edit

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Asked: 2019-12-17 08:03:43 -0500

Seen: 346 times

Last updated: Dec 17 '19