Hi and thanks for your reply. I thought this might be a problem for lots of people as I spoke to another Adagio AR user in town who said he had the same problem. It isn't an issue of dates being changed or a keying error. I traced one problem transaction through and found that if I print "Reports/Customer transactions/current transactions" for that customer to my cut-off date, the o/s balance is nil but if I print "Reports/Customer transactions/current & historical transactions" at the cut-off date then the correct balance shows as o/s. However, that balance does not appear on my Aged Trial Balance report. This particular receivable was collected 7 days after month end and is recorded in the correct period in the GL so the problem is with the subledger report. I don't mind sending you the data - how would I do that?