ROS Beginner Tutorials: Examining the Simple Service and Client (python) - need some help with Client 2

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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 (<link>http ://www.ros .org/wiki/ROS/Tutorials/ExaminingServiceClient</link>). 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
viki@ROS:~/catkin_ws/src/beginner_tutorials/scripts$

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,

Batta