We are running Navision version 3.7. Whenever we navigate on a sales order or invoice from Customer Ledger Entries, we frequently get a warning that says, “A combination of document number and psoting date has been used more than once.” What does this mean? We used to run 2.0, and have always gotten this warning.
It means that you have, for example, a Sales Invoice No. 1000 posted on 2003-12-31 and a Purchase Credit Memo No. 1000 posted on 2003-12-31. It’s not a problem but makes navigating a little more confusing as you’ll find entries for both documents when drilling down on the Document No./Posting Date.
or more likely, You have a balancing account on the payment method /Lars