Odoo xml视图ParseError:“视图定义无效

有人能注意到这种观点的错误吗。我收到ParseError:“无效的视图定义

<record id="project_part_view_tree_wizz" model="ir.ui.view">
            <field name="name">Project Part List</field>
            <field name="model">project.part</field>
            <field name="arch" type="xml">
                <tree string="Parts" editable="bottom">
                    <group>
                        <field name="project_id"/>
                        <field name="number" />
                        <field name="object"/>
                        <field name="stage_id"/>
                        <field name="part_template_id"/>
                        <field name="name"/>
                        <field name="user_id"/>
                    </group>
                    <footer>
                        <button name="generate_project_part" string="Generate"
                                type="object" class="oe_highlight"/>
                        <button string="Cancel" class="oe_link"
                                special="cancel"/>
                    </footer>
                </tree>
            </field>
        </record>