Navigation Problems [closed]

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I am navigating with a pioneer-3dx robot. I have built a map (sort of) and can navigate through some of it. What would cause the robot to stop on its path? The map is incomplete because the robot stopped during its run. Could this be a communication error? Could it be related to the 256MB of RAM present on the robot or the 512 MHz processor? Any ideas are of use here. The robot currently has WiFi communication through its USB port attached to a "death spike" of an antenna. I know the communication works, for I am able to ssh onto the robot. I tried running roscore, rosbag, and the teleop on the robot with a screen command (to keep it running if ssh is lost), and it still stopped in motion.

Thanks in advance,

-Hunter A

Here is my p2os_dashboard.log file from the other day when I last ran it:

[rospy.client][INFO] 2012-06-15 12:31:03,216: init_node, name[/p2os_dashboard_25063_1339781463162], pid[25063]
[xmlrpc][INFO] 2012-06-15 12:31:03,217: XML-RPC server binding to 0.0.0.0
[xmlrpc][INFO] 2012-06-15 12:31:03,217: Started XML-RPC server [http://129.59.89.109:57674/]
[rospy.init][INFO] 2012-06-15 12:31:03,217: ROS Slave URI: [http://129.59.89.109:57674/]
[rospy.impl.masterslave][INFO] 2012-06-15 12:31:03,217: _ready: http://129.59.89.109:57674/
[xmlrpc][INFO] 2012-06-15 12:31:03,218: xml rpc node: starting XML-RPC server
[rospy.registration][INFO] 2012-06-15 12:31:03,218: Registering with master node http://10.20.67.73:11311
[rospy.registration][INFO] 2012-06-15 12:31:03,219: Registering publisher topic [/cmd_motor_state] type [p2os_driver/MotorState] with master
[rospy.registration][INFO] 2012-06-15 12:31:03,234: registering subscriber topic [/battery_state] type [p2os_driver/BatteryState] with master
[rospy.registration][INFO] 2012-06-15 12:31:03,258: registering subscriber topic [/motor_state] type [p2os_driver/MotorState] with master
[rospy.init][INFO] 2012-06-15 12:31:03,318: registered with master
[rospy.rosout][INFO] 2012-06-15 12:31:03,318: initializing /rosout core topic
[rospy.rosout][INFO] 2012-06-15 12:31:03,332: connected to core topic /rosout
[rospy.simtime][INFO] 2012-06-15 12:31:03,349: /use_sim_time is not set, will not subscribe to simulated time [/clock] topic
[rospy.internal][INFO] 2012-06-15 12:31:03,478: topic[/cmd_motor_state] adding connection to [/p2os], count 0
[rospy.internal][INFO] 2012-06-15 12:31:03,583: topic[/rosout] adding connection to [/rosout], count 0
[rospy.core][INFO] 2012-06-15 12:33:03,716: signal_shutdown [signal-2]
[rospy.internal][INFO] 2012-06-15 12:33:03,747: topic[/cmd_motor_state] removing connection to /p2os
[rospy.internal][INFO] 2012-06-15 12:33:03,748: topic[/rosout] removing connection to /rosout
[rospy.impl.masterslave][INFO] 2012-06-15 12:33:03,748: signal-2
[rospy.core][INFO] 2012-06-15 12:33:04,286: signal_shutdown [atexit]

Update: The robot is now stopping at a different location. I have tried two different sizes of antenna and it stops in the same place. What could be causing this issue?

The terminal outputs information too often to post it all. Here ... (more)