After close the PO period ,why the Reset Period End Accrual Flags is not auto trigger.cuscomer need

SR3-6390706910After close the PO period ,why the Reset Period End Accrual Flags is not auto trigger.customer need manually submit.

Customer  did the test follow the steps in note 467584.1 and found following problem:
1.After finishing the receive accrual program,check the GL interface,found that the one po have been invoiced does not  exist in GL interface,so it would not been accrued,the accrued flag is blank. But the other PO which not been invoiced exist in GL interface,the accrued flag is Y.

2.customer closed the Purchase Period,and then check the request,found that the "Reset Period End Accruals" request is not been auto triggered.