You may notice in the journal produced when the NL period is advance that some of the NL accounts show a different period to the period that is being closed.
Accounts where the Expense code has an Open Item flag of R - Rolling, C - Reconciled or c - Contra will use the Nominal Ledger System Parameter shown below to calculate the period to be used in the month end journal. eg in this example closing period 12 would show period 9 (12 -3) on the accounts with R C or c in the open item flag.
