*ros-by-example vol2.*
*CH4 CREATING A URDF MODEL FOR YOUR ROBOT*
**The command line is shown below:**
$ roslaunch rbx2_description box_robot_base_only.launch
**The error message is shown below:**
root@ShawnVM:~/catkin_ws/src/rbx2/rbx2_dynamixels# roslaunch rbx2_description box_robot_base_only.launch
... logging to /root/.ros/log/0d82b658-a196-11e6-9533-000c290a3fdb/roslaunch-ShawnVM-48840.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 tag: xacro
ROS path [0]=/opt/ros/indigo/share/ros
ROS path [1]=/root/catkin_ws/src
ROS path [2]=/opt/ros/indigo/share
ROS path [3]=/opt/ros/indigo/stacks.
Arg xml is
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