Error due to robot_description

[staycoolish]

When following Visualizing Collisions tutorial, the launch file doesn't work. After writing
roslaunch moveit_tutorials visualizing_collisions_tutorial.launch
the following response is obtained:

No such file or directory: /opt/ros/noetic/share/franka_description/robots/panda_arm_hand.urdf.xacro [Errno 2] 
No such file or directory: '/opt/ros/noetic/share/franka_description/robots/panda_arm_hand.urdf.xacro'
RLException: Invalid <param> tag: Cannot load command parameter [robot_description]: command [['/opt/ros/noetic/lib/xacro/xacro', 
'/opt/ros/noetic/share/franka_description/robots/panda_arm_hand.urdf.xacro']] returned with code [2]. 

Param xml is <param name="robot_description" command="$(find xacro)/xacro '$(find franka_description)/robots/panda_arm_hand.urdf.xacro'"/>
The traceback for the exception was written to the log file

Your environment

• ROS Distro: Noetic
• OS Version: Ubuntu 20.04

Error must be similar to the one mentioned here: https://answers.ros.org/question/384900/failed-to-lunch-this-command/

[welcome]

Thanks for reporting an issue. Because we're a volunteer community, providing a pull request with suggested changes is always welcomed.

[rhaschke]

Both, franka_description and moveit_tutorials are strongly changing these days. See #667 for a pending fixup. @v4hn, as we frequently see issues like this one, can't we simply merge the proposed PR?