Q:

Issue with zero and negative goal values

I’m following the example of http://wiki.ros.org/navigation/Tutorials/SendingSimpleGoals with navigation stack. If I set the goal position with positive values the turtle moves as expected, but If it's set to zero or negative values the turtle rotates in the same place, and It returns the message:
 “[ERROR] [1433622909.572352221]: Aborting because a valid plan could not be found. 
Even after executing all recovery behaviors.”

Does navigation only accepts positives values for the position MoveBaseGoal component?

A:

A reason might be that your map only has positive coordinates. So the robot obviously cant find a route as the goal is not on the map.
Maybe have a look at your map using rviz.

