Sage 100

And I'm away from my MAS system -- but this question just sounds like user error -- nothing in the KB. Why do orders with their status = closed appear on the Open PO or Open SO Reports?

Never seen it on the Open SO report, but the Open PO report has check boxes to determine whether you include Completed, or not. If you uncheck, they should go away...

For Purchase Orders, besides the check box, it is because closed or completed order stay in the PO1 and PO2 files based on a setup option. In Sales Order you will often see this is a sales order is not correctly updated to history. I have seen this when the remaining items on a sales order are deleted rather than filled so if you look at the sales order it does not show anything left to ship/invoice.