diff --git a/addons/account/account_invoice.py b/addons/account/account_invoice.py
index fe10e10f7b4..e1e0fccd253 100644
--- a/addons/account/account_invoice.py
+++ b/addons/account/account_invoice.py
@@ -586,8 +586,8 @@ class account_invoice(osv.osv):
                     pay_res_id = pay_line_data and pay_line_data[0].get('value_reference',False) and int(pay_line_data[0]['value_reference'].split(',')[1]) or False
 
                     if not rec_res_id and not pay_res_id:
-                        raise osv.except_osv(_('Configuration Error!'),
-                            _('Cannot find a chart of account, you should create one from Settings\Configuration\Accounting menu.'))
+                        raise self.pool.get('res.config.settings').get_config_warning(cr, _('Cannot find any chart of account: you can create a new one from %(menu:account.menu_account_config)s.'), context)
+
                     if type in ('out_invoice', 'out_refund'):
                         acc_id = rec_res_id
                     else:
diff --git a/addons/auth_signup/res_users.py b/addons/auth_signup/res_users.py
index 077a0feded9..4e86de5b474 100644
--- a/addons/auth_signup/res_users.py
+++ b/addons/auth_signup/res_users.py
@@ -268,7 +268,7 @@ class res_users(osv.Model):
             mail_state = mail_obj.read(cr, uid, mail_id, ['state'], context=context)
 
             if mail_state and mail_state['state'] == 'exception':
-                raise osv.except_osv(_("Cannot send email: no outgoing email server configured.\nYou can configure it under Settings/General Settings."), user.name)
+                raise self.pool.get('res.config.settings').get_config_warning(cr, _("Cannot send email: no outgoing email server configured.\nYou can configure it under %(menu:base_setup.menu_general_configuration)s."), context)
             else:
                 return {
                     'type': 'ir.actions.client',