[Solved] Issue with action_controller_node in Tutorial 4

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1

I have been following the Husarion ROS tutorials for the ROSBot 2.0 Pro, specifically this tutorial (Visual object recognition | Husarion). I noticed I was getting an error when trying to run the code that makes decisions when recognizing an object. Specifically when I create the action_controller.cpp code and edit the CMakeLists.txt file in order for the launch file to run that code.

The error I get is:

Error: cannot launch node of type [tutorial_pkg/action_controller_node]: Cannot locate node of type [action_controller_node] in package [tutorial_pkg]. Make sure file exists in package path and permissions is set to executable

I followed the tutorial as closely as possible. I think the error is when I have to edit CMakeLists.txt:

Last thing to do is editting the CMakeLists.txt file. Find line:

add_executable(tutorial_pkg_node src/tutorial_pkg_node.cpp)

Copy

and add below code after it:

add_executable(action_controller_node src/action_controller.cpp)

Copy

Find also:

target_link_libraries(tutorial_pkg_node    ${catkin_LIBRARIES})

Copy

and add below code after it:

target_link_libraries(action_controller_node    ${catkin_LIBRARIES})

I am confused on how to proceed. I am copying all of the code on the tutorial and I am using the launch file they provide, specifically this line for the action controller node:

I am working on Noetic version 1.15.14., but I will like to upgrade to the panther whenever I can get all of my code working on this rosbot.

Thank you all in advance

2

Hi musicboy,

It looks like you forgot to build your node. You should always build cpp nodes using catkin_make after creating or modifying them. If you built it and it still does not work try cleaning catkin workspace with catkin clean and building it again.

Regards,
Dawid

3

Hello Dawid,

Thanks for your reply, you were right it seems like I did forget to build my node. Running catkin_make seems to fix the problem, but I don’t think my version of ROS recognizes catkin clean as a command, but I don’t think that will be an issue.

Thanks again!