Chapter 8 launch file

[nag92]

when I launch, roslaunch chapter8_configuration_gazebo.launch

I get the following error

Invalid tag: Cannot load command parameter [robot_description]: command [/opt/ros/indigo/share/xacro/xacro.py

[efernandez]

This code is for ROS fuerte, you should use https://github.com/AaronMR/Learning_ROS_for_Robotics_Programming_2nd_edition instead.

Anyway, it looks like you need to sudo apt-get install ros-indigo-xacro