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Hey guys,

I'm following the ROS Tutorials and, using the Python language, I'm currently having some issues trying to solve the item Examining the Simple Service and Client item (http ://www.ros .org/wiki/ROS/Tutorials/ExaminingServiceClient). I was already having a problem with the server in this tutorial, but it was solved in another thread (in link text)

My situation is the following:

  • I run roscore in a terminal

  • I run the server (rosrun beginner_tutorials add_two_ints_server.py) in another, getting Ready to add two ints.

  • But when I try to run the client (rosrun beginner_tutorials add_two_ints_client.py 1 3), I get the following:

    [rospack] Error: stack/package beginner_tutorials not found

Running roswtf gives me the following:

viki@ROS:~/catkin_ws/src/beginner_tutorials/scripts$ roswtf
Package: beginner_tutorials
Cannot find dependencies for package [beginner_tutorials]: missing beginner_tutorials
ROS path [0]=/opt/ros/groovy/share/ros
ROS path [1]=/opt/ros/groovy/share
ROS path [2]=/opt/ros/groovy/stacks

Can anybody help me? I haven't found any clues on the web related to this and I can't figure it out what's really happening.

Can anyone help me? Thanks in advance,


Originally posted by Batta on ROS Answers with karma: 3 on 2013-08-05

Post score: 1

Original comments

Comment by gustavo.velascoh on 2013-08-05:
what is the output of export | grep ROS?


1 Answer 1


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I agree with Gustavo's suggestion. It seems to me that your $ROS_PACKAGE_PATH is probably not set correctly in the terminal you're using to run the client.

It looks like you're using catkin. Remember that you need to source the catkin workspace setup.bash file in each new terminal (source ~/catkin_ws/devel/setup.bash). This will update the $ROS_PACKAGE_PATH for that terminal. You can check this using the command Gustavo referenced above: export | grep ROS_PACKAGE_PATH. Also, rospack find beginner_tutorials should find the correct path to your package.

I can't see where this requirement is covered explicitly in the ROS tutorials. You can see some hints when reading through this section, but it could definitely be made more clear.

Originally posted by Jeremy Zoss with karma: 4976 on 2013-08-06

This answer was ACCEPTED on the original site

Post score: 5


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