Hi,
Please replace in the "plugins/hikashoppayment/banktransfer/banktransfer.php"
function onAfterOrderConfirm(&$order,&$methods,$method_id) {
function onAfterOrderConfirm(&$order,&$methods,$method_id){
$method =& $methods[$method_id];
$this->modifyOrder($order, $method->payment_params->order_status, @$method->payment_params->status_notif_email, false);
By
function onAfterOrderConfirm(&$order,&$methods,$method_id) {
parent::onAfterOrderConfirm($order,$methods,$method_id);
$this->modifyOrder($order->order_id, $this->payment_params->order_status, @$this->payment_params->status_notif_email, false);
$method =& $methods[$method_id];
It should fix your problem.
I will commit these modification for the next HikaShop package.
Regards,