--update=all -> AttributeError: 'NoneType' object has no attribute '_table'

Created by Raphaƫl Valyi - http://www.akretion.com on on 2010-01-15
Keywords:
update migration

This is a known OpenERP bug with custom fields (those OpenERP create to adapt to the Magento product attributes here) with the update code, see details and a simple workaround here:
https://bugs.launchpad.net/magentoerpconnect/+bug/484843