No Approver was found for Standard Purchase
In R12.1.3
We are using position hierarchy for approving the PO>
Buyer X is the first person in the approval list. When this user submitting for approval all ok.
But buyer Y trying to submit PO for approval using same approval list getting Email notification with 'No Approver was found for Standard Purchase'
Buyer Y is not in the approval list.
How to we enable BUYER Y also cab submit PO for approval