[ros-users] Help in ROS tutorial

Hi,
I have encountered some problems when practicing with my tutorial : Creating a ROS Package<http://www.ros.org/wiki/ROS/Tutorials/CreatingPackage>
This is my error report.

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snoopy@ubuntu:~$ roswtf
Loaded plugin tf.tfwtf
No package or stack in context

Static checks summary:

Found 1 error(s).

ERROR Not all paths in ROS_PACKAGE_PATH [YOUR_BEGINNER_TUTORIALS_PATH:/home/snoopy/ros-tutorials/ros_pkg_tutorials:/home/snoopy/ros-tutorials/ros_tutorials:/opt/ros/cturtle/stacks] point to an existing directory:
* YOUR_BEGINNER_TUTORIALS_PATH

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I tried to solve this problem using Environment Setup and this is my output

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snoopy@ubuntu:~$ echo "source /opt/ros/boxturtle/setup.sh" >> ~/.bashrc
snoopy@ubuntu:~$ . ~/.bashrc
bash: /opt/ros/boxturtle/setup.sh: No such file or directory
bash: /opt/ros/boxturtle/setup.sh: No such file or directory
snoopy@ubuntu:~$
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Does it means that my installation had failed?

Thank for your help.