Here is the code

<template id="custom_report_saleorder" inherit_id="sale.report_saleorder">

<xpath expr="//t[@t-call='web.html_container']" position="replace">

<t t-call="web.html_container">

<t t-foreach="docs" t-as="doc">

<t t-if=condition>

<t t-call="tmodule_name.template_id1" t-lang="doc.partner_id.lang"/>

</t>

<t t-if="condition>

<t t-call="module_name.template_id2" t-lang="doc.partner_id.lang"/>

</t>

</t>

</t>

</t>

</xpath>

</template>

another template

<template id="template_id1">

<t t-call="web.external_layout">

<----- code---->

</t>

</template>

i have the same issue. but in my code, there exists <t t-call="web.external_layout">. Can you help me on it.