```
<?xml version="1.0" encoding="utf-8"?>
<odoo>
<data
<record model='ir.ui.view' id='view_print_button_sale_form'>
<field name='name'>print.button.sale.form</field>
<field name='model'>sale.order</field>
<field name='inherit_id' ref='sale.view_order_form'/>
<field name='arch' type='xml'>
<xpath expr="//button[@name='print_quotation']" position="attributes">
<attribute name="states">[('state','=','sale')]</attribute>
</xpath>
</field>
</record>
</data>
</odoo>
```
its giving me no error during installing but condition is not appear
which point i'm missing ?