We are using R12.1.3, and applied patch no. 21198991:R12.PRC_PF.B
which is to start using AME for PO approval. But still we are using normal position hierarchy, with
approval workflow as : PO Approval
Workflow start process : PO Approval Top Process
Now, I am trying to create a PO and on approving the same, I am getting the notification as "Unable to reserve standard purchase order no. xyz"
Where as sufficient funds are available in the budget account.
Note: PO encumbrance is on, and we are using absolute budgetary control