Back to Back order fails in PO requisition interface

   Hi,

Back to back Order struck in requisition interface with following error.

"Preparer is not an active worker

Cause:        You entered an inactive worker as the preparer.  

Action:        Enter an active worker as the preparer.  

Action:        Make the preparer an active worker.

"

"The requester is not an active worker

Cause:        You entered a requester who is not a valid worker.  Enter: Enter a requester who is a valid worker.

On further checking the DELIVER_TO_REQUESTOR_ID, Preparer_id in PO_REQUISITIONS_INTERFACE_ALL shows "NULL".

Appreciate your help here.

Thanks..