error while approving a PO: The accounting date is not in an open encumbrance period

Hello,

 

While I am approving a PO with  'requires reapproval' status, I am getting the below error.

Error: Line# 1 Schedule #1 Distribution# 1 : The accounting date is not in an open encumbrance period.

I found this below document in oracle support.

When Approving Partially Received, Unreserved PO's With GL Date In Closed Period: The Accounting Date Is Not In An Open Encumbrance Period [ID 796402.1]

Please let me know the cause and solution for this error.  ThanksRG