how to solve this error 

My xml  file:

<?xml version="1.0" encoding="UTF-8"?>

<openerp>

 <data>

  <record id="student_prfl_tree" model="ir.ui.view">

   <field name="name">student.profile.tree</field>

   <field name="model">student.profile</field>

   <field name="type">tree</field>

   <field name="arch" type="xml">

    <tree string="student">

    </tree>

   </field>

  </record>

  <record id="student_prfl_form" model="ir.ui.form">

   <field name="name">student.profile.form</field>

   <field name="model">student.profile</field>

   <field name="type">form</field>

   <field name="arch" type="xml">

    <form string="student">

    </form>

   </field>

  </record>

  <record id="student_prfl_action" model="ir.actions.act_window">

   <field name="name">student</field>

   <field name="type">ir.actions.act_window</field>

   <field name="res_model">student.profile</field>

      <field name="view_type">form,tree</field>

      <field name="view_id" ref="student_prfl_tree"></field>

     </record>

  <menuitem name="student" id="menu_student"/>

  <menuitem name="student_one" id="menu_sub_student" parent="menu_student"/>

  <menuitem action="student_prfl_action" id="menu_student_act" parent="menu_sub_student"/>

 </data>

</openerp>