Hi All, I've just started going through the ROS tutorials, and ran into a few roadblocks... which I've been able to get around, but I thought I'd share what I had to do to get things to work so that the tutorials could be updated so others don't have to get lost like me. Admittedly, I'm pretty new to ubuntu, python, etc. so maybe some of these things were errors on my part, or things that would be obvious to more experienced users. I'm running Lucid, and followed the instructions online for the SVN install. Doing so for the tutorials put the folder 'ros-tutorials' in my home directory. That caused a variety of problems.. there's probably many ways to fix it, but this ended up working for me: move 'ros-tutorials' to ~/ros (or wherever your main ros folder is). edit ~/ros/setup.sh: edit this line: export ROS_PACKAGE_PATH=INSTALL_PATH/ros/stacks so that it reads: export ROS_PACKAGE_PATH=INSTALL_PATH/ros Cheers, - Floris -- Floris van Breugel Caltech Graduate Student Control and Dynamical Systems (925) 963 8280 Wildlife and Landscape Photographer Galleries: http://www.ArtInNaturePhotography.com/ Blog: http://www.ArtInNaturePhotography.com/wordpress/ 2010 CALENDARS! Now available on my website!