Hello

I have a small problem in my qweb report, i get error :

Internal Server Error.

in my file "rapport_bc.xml :

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <report 
            id="rapport_bc"
            string="Bon de commande"
            model="sale.order" 
            report_type="qweb-pdf"
            file="sale.model_bc" 
            name="sale.model_bc" 
        />
    </data>
</openerp>

and in my file "model_bc.xml'

<openerp>
<data>
<template id="model_bc_doc">
    <t t-call="report.html_container">
        <t t-foreach="docs" t-as="o">
            <t t-call="report.external_layout">
                <div class="page">
                    <h2>Report title</h2>
                    <p>This object's name is <span t-field="o.name"/></p>
                </div>
            </t>
        </t>
    </t>
</template>
<template id="model_bc">
    <t t-call="report.html_container">
        <t t-foreach="doc_ids" t-as="doc_id">
          <t t-raw="translate_doc(doc_id, doc_model, 'partner_id.lang', sale.model_bc_doc')"/>
        </t>
    </t>
</template>
</data>
</openerp>

i reference my report in "__openerp__.py"

"init_xml": [],
    'update_xml': [
        'new_sale_view.xml',
        'rapport_bc.xml',
        'model_bc.xml',
    ],