Siebel Script Raise Error Text

Hi

We are using the below script under Cfg_InstPostSynchronize to give an error to the user to update the required text attribute if it's blank

function Cfg_InstPostSynchronize (RootProduct)

{

var item;

var item1="Attribute Cannot be Null";

  

        item=GetAttribute("$.[POCQUOTETYPE]#1", "Media")

        if (item.length<1)

        {

            TheApplication().RaiseErrorText(item1);

        }

item = null;

item1=null;

}

Now when we are customizing the bundle and then clicking on Done button without updating the Required Attribute text field then though the error text is not shown even though the user doesnot exit e-config.

Please suggest how can we show the error text.