It's my fault... I fixed it.
In DecisionMaking.hx, update setCost to (github has been updated) :
public static function setCost(s:String,c:Float)
{
if (AStar.cst==null)
{
AStar.cst=new Hash<Float>();
}
AStar.cst.set(s,c);
}
See the new sample dm-astar-2. Why not follow me to get the next updates ?