Good morning,
Are you saying that when you print the Period Sensitive Aging as of Period 9/Sept, invoices posted to Sept and payments posted to Sept which were Open/Unpaid at the end of Sept. are not showing as Open documents?
Payments entered in any month and posted in Sept and applied in full to any document from any period in a Sept. batch will not be Open documents and would correctly not appear on a Period Sensitive Aging printed as of Sept. Invoices entered in any month and posted to Sept. will only show on the Sept. Period Sensitive Aging if they are Open (unpaid) at the end of Sept. The Period to Post on both the Invoice batches and the batches that Paid them are key.
Also, make sure the batches were released, they were entered in the right company, they were entered in the right database; check to see if the report has been customized.
Laura