SBA Version 1.5.4 for Zen Cart Version 1.5.7d

Just upgraded my zencart from 1.5.6 and updated SBA to current version

All works well except the checkout confirmation fails giving error
Call to undefined function zen_get_customid() in /includes/templates/my_templates/templates/tpl_checkout_confirmation_default.php :151

Line 151 reads:
if( $tmpCheck != zen_get_customid($order->products[$i]['id'],$attributes) ){
$tmpCheck = zen_get_customid($order->products[$i]['id'],$attributes);
$customid .= ' ' . zen_get_customid($order->products[$i]['id'],$attributes) . ' ';
}

So, any idea why this function is undefined to this script and what can i do about it. Help anyone?