Check the Normal Representation of the account(s) by clicking on the accounts button > Setup. I suuspect the Normal Rep is set to Periodic. Change it to Perpetuaal (F3 to pick). Block the account and then Print > Account Ledgers with the Opening Balance Date with the Begin and End Dates you have chosen.
To avoid changing the Normal Rep on the account, select an opening balance date prior to the opening entries in your application database (Jan 1, 1980 for example).
This method is the opposite to the way NV1 performed PRTACCTS.
Regards to All,