Hi,
there is no class “bank-account”.
Use instead these computed field formula to show the iban in list view:
(($reloadedobj = new Facture($db)) && ($reloadedobj->fetchNoCompute($obj->id) > 0)) ? ((($rdobj = new Account($db)) && ($rdobj->fetchNoCompute($reloadedobj->fk_account) > 0)) ? $rdobj->iban: 'no iban'):''
This will not work on the detail view of the invoice.
