ros2 launch fails after following some tutorials

ros2
launch

asked 2022-04-14 04:07:42 -0500

vKuehn
116 ●10 ●15 ●19

updated 2022-04-14 08:36:07 -0500

ros2 launch turtlebot3_cartographer cartographer.launch.py works fine.

colcon_cd PACKAGENAME to ~/dev_ws/src/PACKAGENAME works fine.

colcon build --packages-select PACKAGENAME works fine in ~/dev_ws.

I have that in ~/.baschrc

export _colcon_cd_root=~/dev_ws
export ROS_DOMAIN_ID=1
export ROS_PYTHON_VERSION=3
export ROS_VERSION=ros-foxy
export LC_NUMERIC="en_US.UTF-8"
source /opt/ros/foxy/setup.bash
source /usr/share/colcon_cd/function/colcon_cd.sh

What to check why ros2 launch PACKAGENAME.launch.py would fail ?

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answered 2022-04-14 15:18:38 -0500

vKuehn
116 ●10 ●15 ●19

solved.. a package install was missing for one of mine under ~/dev_ws/src. After installing that ros2 launch works fine very odd as the missing PACKAGENAME was the one I have created.

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How did you create this package? Maybe you missed a step in its configuration

ljaniec ( 2022-04-14 18:15:20 -0500 )edit

@ljaniec that is very probably the case. But how to fix such a problem I would have hoped for some hint during the start or a log to look at...

vKuehn ( 2022-04-15 09:00:42 -0500 )edit

I think rosdep should help you here with additional dependencies in your workspace

ljaniec ( 2022-04-15 09:52:27 -0500 )edit

that's the ros1 documentation. but thanks for the hint

vKuehn ( 2022-04-15 09:54:11 -0500 )edit

Rosdep is used with ROS2 too: https://docs.ros.org/en/galactic/Inst..., https://docs.ros.org/en/galactic/How-..., https://answers.ros.org/question/3107...

ljaniec ( 2022-04-15 10:00:35 -0500 )edit

thanks for that and keeping answering

vKuehn ( 2022-04-18 14:36:32 -0500 )edit

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answered 2022-04-14 07:57:57 -0500

Per Edwardsson

501 ●14 ●58 ●31

The command is ros2 launch PACKAGENAME launchfile.launch.py. But if you can provide the exact error code you are facing, that would useful in troubleshooting.

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oh yes that is what I did. Corrected the question for that

it worked but now complains Package 'PACKAGENAME' not found: "package 'PACKAGENAME' not found, searching: ['/opt/ros/foxy']"

for all my packages in ~/dev_ws

vKuehn ( 2022-04-14 08:38:24 -0500 )edit

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ros2 launch fails after following some tutorials

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