I have successfully migrated my openerp 7 databases to odoo 8.

I am running odoo from docker using the official docker hub image.

Everything is fine except my customer invoices do not print correctly : I have no header and footer at all (all my company information is basically gone.

I guess this is due to the Qweb reporting scheme so I tried to dig a little into that, modifying the reports.

I followed th odoo guide tutorial at http://odoo.guide/odoo-report-design-basics/ which is not very helpfull as I am continuously stuck in server errors with missing documents (see my stack overflow question on the subject http://stackoverflow.com/questions/32078894/impossible-to-create-a-custom-report-in-odoo-8

I tried to modify the external_layout_header manuall to see what happens with no success again.

I need possible tracks to follow from there, either a simple, no python coding required, documentation to understand why the inital installation does not find out the company header information, or a way to find out what actual document is not found by odoo server when the trace says there is a missing document.

Thanks in advance,