Gazebo GUI Error [Param.cc 181]:: Unable to set value [1,0471975511965976] and [0,100000001]

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This question has been asked before in this forum at least once ( http://answers.ros.org/question/19940... ). Nevertheless, i haven't found the cause behind the occurrence of the following Gazebo GUI errors,

 - Error [Param.cc:181] Unable to set value [1,0471975511965976] for key[horizontal_fov]
 - Error [Param.cc:181] Unable to set value [0,100000001] for key[near]

Things performed :: I successfully installed ROS Indigo on Ubuntu (Description: 14.04.02 LTS, Codename: Trusty) 64-bit virtual machine by following the instructions from the website http://wiki.ros.org/indigo/Installati... .

Later, i tried to launch the gazebo simulator to visualize universal robot by going through the tutorial mentioned in the website http://wiki.ros.org/universal_robot/T... .

The following is the result of launching the gazebo simulator ::

... logging to /home/prof/.ros/log/6c565688-0b67-11e5-8411-0800272b2ea9/roslaunch-PROFPC-28231.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://PROFPC:58741/

SUMMARY
========

PARAMETERS
 * /arm_controller/action_monitor_rate: 10
 * /arm_controller/constraints/elbow_joint/goal: 0.1
 * /arm_controller/constraints/elbow_joint/trajectory: 0.1
 * /arm_controller/constraints/goal_time: 0.6
 * /arm_controller/constraints/shoulder_lift_joint/goal: 0.1
 * /arm_controller/constraints/shoulder_lift_joint/trajectory: 0.1
 * /arm_controller/constraints/shoulder_pan_joint/goal: 0.1
 * /arm_controller/constraints/shoulder_pan_joint/trajectory: 0.1
 * /arm_controller/constraints/stopped_velocity_tolerance: 0.5
 * /arm_controller/constraints/wrist_1_joint/goal: 0.1
 * /arm_controller/constraints/wrist_1_joint/trajectory: 0.1
 * /arm_controller/constraints/wrist_2_joint/goal: 0.1
 * /arm_controller/constraints/wrist_2_joint/trajectory: 0.1
 * /arm_controller/constraints/wrist_3_joint/goal: 0.1
 * /arm_controller/constraints/wrist_3_joint/trajectory: 0.1
 * /arm_controller/gains/elbow_joint/d: 100.0
 * /arm_controller/gains/elbow_joint/i: 500.0
 * /arm_controller/gains/elbow_joint/i_clamp: 100.0
 * /arm_controller/gains/elbow_joint/p: 1500.0
 * /arm_controller/gains/shoulder_lift_joint/d: 100.0
 * /arm_controller/gains/shoulder_lift_joint/i: 500.0
 * /arm_controller/gains/shoulder_lift_joint/i_clamp: 100.0
 * /arm_controller/gains/shoulder_lift_joint/p: 1500.0
 * /arm_controller/gains/shoulder_pan_joint/d: 100.0
 * /arm_controller/gains/shoulder_pan_joint/i: 500.0
 * /arm_controller/gains/shoulder_pan_joint/i_clamp: 100.0
 * /arm_controller/gains/shoulder_pan_joint/p: 600.0
 * /arm_controller/gains/wrist_1_joint/d: 0.0
 * /arm_controller/gains/wrist_1_joint/i: 0.0
 * /arm_controller/gains/wrist_1_joint/i_clamp: 0.0
 * /arm_controller/gains/wrist_1_joint/p: 100.0
 * /arm_controller/gains/wrist_2_joint/d: 0.0
 * /arm_controller/gains/wrist_2_joint/i: 0.0
 * /arm_controller/gains/wrist_2_joint/i_clamp: 0.0
 * /arm_controller/gains/wrist_2_joint/p: 100.0
 * /arm_controller/gains/wrist_3_joint/d: 0.0
 * /arm_controller/gains/wrist_3_joint/i: 0.0
 * /arm_controller/gains/wrist_3_joint/i_clamp: 0.0
 * /arm_controller/gains/wrist_3_joint/p: 100.0
 * /arm_controller/joints: ['shoulder_pan_jo...
 * /arm_controller/state_publish_rate: 25
 * /arm_controller/stop_trajectory_duration: 0.5
 * /arm_controller/topic: test
 * /arm_controller/type: effort_controller...
 * /joint_state_controller/publish_rate: 50
 * /joint_state_controller/type: joint_state_contr...
 * /robot_description: <?xml version="1....
 * /robot_state_publisher/publish_frequency: 50.0
 * /robot_state_publisher/tf_prefix: 
 * /rosdistro: indigo
 * /rosversion: 1.11.13
 * /use_sim_time: True

NODES
  /


 - arm_controller_spawner (controller_manager/spawner)
 - fake_joint_calibration (rostopic/rostopic)
 - gazebo (gazebo_ros/gzserver)
 - gazebo_gui (gazebo_ros/gzclient)
 - joint_state_controller_spawner (controller_manager/spawner)
 - robot_state_publisher (robot_state_publisher/robot_state_publisher)
 - spawn_gazebo_model (gazebo_ros/spawn_model)

auto-starting new master
process[master]: started with pid [28246]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to 6c565688-0b67-11e5-8411-0800272b2ea9
process[rosout-1]: started with pid [28259]
started core service [/rosout]
process[gazebo-2]: started with pid [28262]
process[gazebo_gui-3]: started with pid [28266]
process ...