Posting to a Prior Period in AP
We just implemented PUM 31. In that release, they changed the AP posting process to only post to an open period.
The response that I've received from MOS is that the reason to enhance Voucher Posting is to sync up the behavior between Online Voucher and Voucher Posting. In Online Voucher, if voucher is in a closed accounting period, user gets an error and not allow to process to post the voucher. For the same voucher, it is allowed to be posted if run from Voucher Posting via run control page. We enhanced it so that we do not allow voucher in closed accounting period to be posted in Voucher Posting.