hi 

I have succeed in the initial set of tutorials, however in the tutorial "Creating a simple robot model using lxf2urdf.py" I have encounter a little problem, after execution of 
roslaunch learning_nxt robot.launchI found a this 

... logging to /home/ros/.ros/log/fb745f36-b8f1-11df-8e6d-001c230b64b1/roslaunch-robotics-17292.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

Invalid roslaunch XML syntax: junk after document element: line 3, column 2


the log shows the following message

[INFO] 2010-09-05 16:45:41,995: Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
[INFO] 2010-09-05 16:45:41,999: Done checking log file disk usage. Usage is <1GB.
[INFO] 2010-09-05 16:45:42,000: roslaunch starting with args ['/opt/ros/cturtle/ros/bin/roslaunch', 'learning_nxt', 'robot.launch']
[INFO] 2010-09-05 16:45:42,000: roslaunch env is {'GDM_KEYBOARD_LAYOUT': 'gb', 'GNOME_DESKTOP_SESSION_ID': 'this-is-deprecated', 'LESSOPEN': '| /usr/bin/les$
[INFO] 2010-09-05 16:45:42,000: starting in server mode
[INFO] 2010-09-05 16:45:42,001: starting roslaunch parent run
[INFO] 2010-09-05 16:45:42,001: loading roscore config file /opt/ros/cturtle/ros/tools/roslaunch/roscore.xml
[INFO] 2010-09-05 16:45:42,002: Added core node of type [rosout/rosout] in namespace [/]
[INFO] 2010-09-05 16:45:42,003: loading config file /home/ros/nxtros/nxt/nxt/learning_nxt/robot.launch
[ERROR] 2010-09-05 16:45:42,003: Invalid roslaunch XML syntax: junk after document element: line 3, column 2


not sure what exactly is wrong, any help would be appreciated

Thanks