Error 3205: <role_name> is not a valid role or user name while Sending Notifications for multiple em

Hi All,

       We are in EBS R12 and using oracle 10g database.The requirement is to send Notification to multiple emails id's.

Below is the way how we have achieved it

1.Create a Role item Attribute in workflow.

2.Create Adhoc roles for multiple email id's.

3.Assign the role created to the item attribute.

4.Set the item attribute as performer and expand the role in the notification.

When the workflow is initiated below error is begin displayed

Error Name  WFNTF_ROLE.

Error Message  3205: 'xxTestRole'is not a valid role or user name. 

Error Stack  Wf_Notification.SendGroup'xxTestRole',xxtestmultie, xx_NEW_SCHM_EMAIL, WF_ENGINE.CB) Wf_Engine_Util.Notification_Send(