issue regarding xacro

rosrun xacro xacro.py kit_c.xacro -o /tmp/kit_c.urdf
xacro: Traditional processing is deprecated. Switch to --inorder processing!
To check for compatibility of your document, use option --check-order.
For more infos, see http://wiki.ros.org/xacro#Processing_Order
No such file or directory: kit_c.xacro None None


anyone help me with this 
