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How run few node from one package?

asked 2017-07-18 03:51:33 -0500

Ruslan-maniak gravatar image

Hi. I installed diferential_drive package. One node from this package run well. But if i running another one node from this package, ROS don't found this package.

$ rosrun differential_drive twist_to_motors.py
[rospack] Error: package 'differential_drive' not found

How can I run few node frome one package? Thanks.

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Are you make sure you've have sourced the workspace setup.bash file? Maybe, you're trying to run it in another terminal that you didn't execute e.g: source ~/catkin_ws/setup.bash

marcoarruda gravatar image marcoarruda  ( 2017-07-18 08:06:43 -0500 )edit

Yes, i'm sure. I did source ~/catkin_ws/setup.bash. First node run is well. But after if i do "rospack list", then list no have differential_drive. If no one node is run from this package, rospack list have differential_drive. Why package is gone when i run node? Sorry for my English )

Ruslan-maniak gravatar image Ruslan-maniak  ( 2017-07-18 22:46:06 -0500 )edit

I try do "source ~/catkin_ws/devel/setup.bash" before every rosrun node from package in every terminal. And it's work. So that is right using?

Ruslan-maniak gravatar image Ruslan-maniak  ( 2017-07-18 23:10:06 -0500 )edit

Exactly! That's the way you have to use ROS. You should source the workspace devel/setup.bash file manually or in your .bashrc file. :)

marcoarruda gravatar image marcoarruda  ( 2017-07-24 21:58:07 -0500 )edit

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answered 2017-07-19 09:02:28 -0500

So, if the "source ~/catkin_ws/devel/setup.bash" worked, that's because you didn't add it to your .bashrc file.

The ~/.bashrc file is "sourced" every time you open a new terminal. If you prefer, you can execute "source ~/catkin_ws/devel/setup.bash" for each terminal. But if you want to save some time, just write this command at the end of this .bashrc file.

Take a look again in the installation page, you'll see an explanation about this.

It's the Environment Setup section. http://wiki.ros.org/kinetic/Installat...

Hope it can help you!

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Yes. You right. Thank you very much.

Ruslan-maniak gravatar image Ruslan-maniak  ( 2017-07-24 23:58:38 -0500 )edit

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Asked: 2017-07-18 03:51:33 -0500

Seen: 79 times

Last updated: Jul 19 '17