Resource not found: px4 ROS path [0] ..

[JomondLim]

After following the offboard control example (python), when running roslaunch offboard_py start_offb.launch, i received this error despite adding the extra few lines to the bashrc as instructed in the tutorial:
Resource not found: px4
ROS path [0]=/opt/ros/melodic/share/ros
ROS path [1]=/home/ubuntu/catkin_ws/src/mavlink
ROS path [2]=/home/ubuntu/catkin_ws/src/mavros/libmavconn
ROS path [3]=/home/ubuntu/catkin_ws/src/mavros/mavros_msgs
ROS path [4]=/home/ubuntu/catkin_ws/src/mavros/mavros
ROS path [5]=/home/ubuntu/catkin_ws/src/mavros/mavros_extras
ROS path [6]=/home/ubuntu/catkin_ws/src/offboard_py
ROS path [7]=/home/ubuntu/catkin_ws/src/mavros/test_mavros
ROS path [8]=/opt/ros/melodic/share
The traceback for the exception was written to the log file

This is what my .bashrc file is looking like:

source /opt/ros/melodic/setup.bash
source /PX4-Autopilot/Tools/simulation/gazebo/setup_gazebo.bash /PX4-Autopilot /PX4-Autopilot/build/px4_sitl_default
source /home/ubuntu/catkin_ws/devel/setup.bash
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:/PX4-Autopilot
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:/PX4-Autopilot/Tools/simulation/gazebo/sitl_gazebo
export GAZEBO_MODEL_PATH=$GAZEBO_MODEL_PATH:/PX4-Autopilot/Tools/simulation/gazebo/sitl_gazebo
export GAZEBO_PLUGIN_PATH=$GAZEBO_PLUGIN_PATH:/usr/lib/aarch64-linux-gnu/gazebo-9/plugins

Would appreciate if someone helps with this issue.
Thanks in advance

[Jaeyoung-Lim]

@JomondLim Are you sure your PX4 autopilot source exists in the path /PX4-Autopilot ?

You can check with

ls /PX4-Autopilot

[JomondLim]

@Jaeyoung-Lim

Hi thanks for the reply,

When we ran ls PX4-Autopilot, we received
CMakeLists.txt LICENSE cmake posix-configs
CODE_OF_CONDUCT.md Makefile eclipse.cproject src
CONTRIBUTING.md README.md eclipse.project test
CTestConfig.cmake ROMFS integrationtests test_data
Documentation Tools launch validation
Firmware.sublime-project appveyor.yml msg
Jenkinsfile boards package.xml
Kconfig build platform

Correct me if i'm wrong, but isn't src PX4 Autopilot's source?

[stevenchangg]

Hi @JomondLim

Currently I am facing the same issue as you :(
Have u figured out the solution to it ? Would mean a lot as I have been struggling with this issue for a week @Jaeyoung-Lim
Thank you

[FrancSerra]

I'm currently facing the exact same problem. DId you guys managed to fix this? @stevenchangg @JomondLim. I really need help on this. Thank you very much

[beniaminopozzan]

@FrancSerra are you referring to this script?
https://docs.px4.io/main/en/ros/mavros_offboard_python.html#launching-your-script

[FrancSerra]

@FrancSerra are you referring to this script? https://docs.px4.io/main/en/ros/mavros_offboard_python.html#launching-your-script

Yes indeed I am

[beniaminopozzan]

ok, then try to use

source ~/PX4-Autopilot/Tools/simulation/gazebo-classic/setup_gazebo.bash ~/PX4-Autopilot ~/PX4-Autopilot/build/px4_sitl_default
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/PX4-Autopilot
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/PX4-Autopilot/Tools/simulation/gazebo-classic/sitl_gazebo-classic

instead of

source ~/PX4-Autopilot/Tools/simulation/gazebo/setup_gazebo.bash ~/PX4-Autopilot ~/PX4-Autopilot/build/px4_sitl_default
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/PX4-Autopilot
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/PX4-Autopilot/Tools/simulation/gazebo/sitl_gazebo
export GAZEBO_PLUGIN_PATH=$GAZEBO_PLUGIN_PATH:/usr/lib/x86_64-linux-gnu/gazebo-9/plugins

the reason is the sitl_gazebo has been renamed sitl_gazebo-classic and it is now located in Tools/simulation/gazebo-classic/sitl_gazebo-classic

[pranavc2255]

ok, then try to use

source ~/PX4-Autopilot/Tools/simulation/gazebo-classic/setup_gazebo.bash ~/PX4-Autopilot ~/PX4-Autopilot/build/px4_sitl_default
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/PX4-Autopilot
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/PX4-Autopilot/Tools/simulation/gazebo-classic/sitl_gazebo-classic

instead of

source ~/PX4-Autopilot/Tools/simulation/gazebo/setup_gazebo.bash ~/PX4-Autopilot ~/PX4-Autopilot/build/px4_sitl_default
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/PX4-Autopilot
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/PX4-Autopilot/Tools/simulation/gazebo/sitl_gazebo
export GAZEBO_PLUGIN_PATH=$GAZEBO_PLUGIN_PATH:/usr/lib/x86_64-linux-gnu/gazebo-9/plugins

the reason is the sitl_gazebo has been renamed sitl_gazebo-classic and it is now located in Tools/simulation/gazebo-classic/sitl_gazebo-classic

Did anyone solve this issue?

I am still getting the same error, even changing to gazebo-classic?

[pranavc2255]

I'm currently facing the exact same problem. DId you guys managed to fix this? @stevenchangg @JomondLim. I really need help on this. Thank you very much

Did you solve my friend?

[Jaeyoung-Lim]

@pranavc2255 High chance that your change to gazebo-classic was incomplete.
Please share what you actually did

[mgrallos]

I'm getting the same error and I'm new to PX4. what if I use this for simulation "make -j8 px4_sitl_default gazebo "
and not gazebo-classic?
Also, I don't see a "simulation" folder inside my /PX4-Autopilot/Tools directory.

[beniaminopozzan]

@mgrallos
please share which PX4 version / commit / tag you are currently using.

[mgrallos]

@mgrallos please share which PX4 version / commit / tag you are currently using.
it says v1.12.3

[mgrallos]

here's the inside my PX4-Autopilot/Tools directory

[beniaminopozzan]

@mgrallos , you are working with version 1.12 then, please follow the gazebo simulation documentation for that version
https://docs.px4.io/v1.12/en/simulation/gazebo.html