Do you have journals (eg payment methods) defined in your OpenERP? Because else, may be OpenERP is unable to select any journal_id. It may happen if you don't have demo data installed and didn't crate journals properly either.
Do you have journals (eg payment methods) defined in your OpenERP? Because else, may be OpenERP is unable to select any journal_id. It may happen if you don't have demo data installed and didn't crate journals properly either.