Hi ,THis is my code ............

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="sale_order_form_inherited1" model="ir.ui.view">
        <field name="name">sale.order.form.inherited</field>
        <field name="model">sale.order</field>
        <field name="inherit_id" ref="sale.view_order_form"/>
        <field name="arch" type="xml">
            <xpath expr="/form/sheet/group/group/field[@name='client_order_ref']" position="after">
                    <field name="status_id"/>
            </xpath>
        </field>
                
    </record>
    
    <record id="view_order_tree" model="ir.ui.view">
            <field name="name">sale.view_order_tree</field>
            <field name="model">sale.order</field>
            <field name="inherit_id" ref="sale.view_order_tree"/>
            <field name="arch" type="xml">
                <field name="state" position="after">
                    <field name="status_id"/>
                </field>
            </field>
</record>
    
     <record id="search_sale_order_ept" model="ir.ui.view"> 
                 <field name="name">search_sale_order_ept</field>
                 <field name="model">sale.order</field> 
                 <field name="type">search</field> 
                 <field name="inherit_id" ref="sale.view_sales_order_filter"/> 

                    <filter  string="Hold" domain="[('state','=','hold')]" help="Hold" name='filter_hold'/>#Thi sis the error line 
                    <filter string="Back Order" domain="[('state','=','back_order')]" help="Back Order" name='filter_backorder'/>

</record>        
    </data>
</openerp>

------------------------------

Error

File "lxml.etree.pyx", line 2773, in lxml.etree._Validator.assert_ (src/lxml/lxml.etree.c:113335) AssertionError: Did not expect element filter there, line 33