ERROR: Model Parsing the xml failed

edit

i created a urdf file from xacro file. eventhough i got error i noticed the urdf has been created the following was the error i got.

  redefining global symbol: pi
    when processing file: /home/akash/project/src/techman_robot_ros-master/tm_grasp_description/urdf/tm700.urdf.xacro
        included from: hrwros.xacro
        akash@akash:~/project/src/tec

i have noticed the urdf file has been created so when I tried to run

    check_urdf hrwros.urdf

and this is the urdf file

<?xml version="1.0" encoding="utf-8"?>
<!-- =================================================================================== -->
<!-- |    This document was autogenerated by xacro from hrwros.xacro                   | -->
<!-- |    EDITING THIS FILE BY HAND IS NOT RECOMMENDED                                 | -->
<!-- =================================================================================== -->
<robot name="hrwros">
  <!-- world -->
  <link name="world"/>
  <!-- Links -->
  <link name="world_interface"/>
  <link name="workcell">
    <visual>
      <geometry>
        <mesh filename="package://hrwros_support/meshes/workcell/visual/workcell.dae"/>
      </geometry>
    </visual>
    <collision>
      <geometry>
        <mesh filename="package://hrwros_support/meshes/workcell/collision/workcell.dae"/>
      </geometry>
    </collision>
    <inertial>
      <inertia ixx="1.0" ixy="0" ixz="0" iyy="1.0" iyz="0" izz="1.0"/>
      <mass value="100"/>
    </inertial>
  </link>
  <joint name="workcell_to_world_interface" type="fixed">
    <parent link="world_interface"/>
    <child link="workcell"/>
    <origin rpy="0 0 1.57079632679" xyz="0 0 0"/>
  </joint>
  <joint name="robot1_pedestal_joint" type="fixed">
    <origin rpy="0 0 0" xyz="0.5 1.8 0.0"/>
    <parent link="world_interface"/>
    <child link="robot1_pedestal_link"/>
  </joint>
  <link name="robot1_pedestal_link">
    <visual>
      <origin xyz="0 0 0.475"/>
      <geometry>
        <box size="0.3 0.3 0.95"/>
      </geometry>
      <material name="pedestal_color">
        <color rgba="0 0.156862745098 0.525490196078 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="0 0 0.475"/>
      <geometry>
        <box size="0.3 0.3 0.95"/>
      </geometry>
    </collision>
    <inertial>
      <mass value="500"/>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <inertia ixx="0.001" ixy="0" ixz="0" iyy="0.001" iyz="0" izz="0.001"/>
    </inertial>
  </link>
  <gazebo reference="robot1_pedestal_link">
    <material>Gazebo/Blue</material>
  </gazebo>
  <transmission name="robot1_shoulder_1_trans">
    <type>transmission_interface/SimpleTransmission</type>
    <joint name="robot1_shoulder_1_joint">
      <hardwareInterface>PositionJointInterface</hardwareInterface>
    </joint>
    <actuator name="robot1_shoulder_1_motor">
      <mechanicalReduction>1</mechanicalReduction>
    </actuator>
  </transmission>
  <transmission name="robot1_shoulder_2_trans">
    <type>transmission_interface/SimpleTransmission</type>
    <joint name="robot1_shoulder_2_joint">
      <hardwareInterface>PositionJointInterface</hardwareInterface>
    </joint>
    <actuator name="robot1_shoulder_2_motor">
      <mechanicalReduction>1</mechanicalReduction>
    </actuator>
  </transmission>
  <transmission name="robot1_elbow_1_trans">
    <type>transmission_interface/SimpleTransmission</type>
    <joint name="robot1_elbow_1_joint">
      <hardwareInterface>PositionJointInterface</hardwareInterface>
    </joint>
    <actuator name="robot1_elbow_1_motor">
      <mechanicalReduction>1</mechanicalReduction>
    </actuator>
  </transmission>
  <transmission name="robot1_wrist_1_trans">
    <type>transmission_interface/SimpleTransmission</type>
    <joint name="robot1_wrist_1_joint">
      <hardwareInterface>PositionJointInterface</hardwareInterface>
    </joint>
    <actuator name="robot1_wrist_1_motor">
      <mechanicalReduction>1</mechanicalReduction>
    </actuator>
  </transmission>
  <transmission name="robot1_wrist_2_trans">
    <type>transmission_interface/SimpleTransmission</type>
    <joint name="robot1_wrist_2_joint">
      <hardwareInterface>PositionJointInterface</hardwareInterface>
    </joint>
    <actuator name="robot1_wrist_2_motor">
      <mechanicalReduction>1</mechanicalReduction>
    </actuator>
  </transmission>
  <transmission name="robot1_wrist_3_trans">
    <type>transmission_interface/SimpleTransmission</type>
    <joint name="robot1_wrist_3_joint">
      <hardwareInterface>PositionJointInterface</hardwareInterface>
    </joint>
    <actuator name="robot1_wrist_3_motor">
      <mechanicalReduction>1</mechanicalReduction>
    < ...