Un Mark a previously selected vendor invoice for payment

Some time back, in AX 2009, I knew how to unmark an invoice (AR or AP) that has been selected for payment. Seems it was in the Open Transactions Editing.

For example, I have an AP Payment journal and I select an invoice for payment by marking it. But I never finish the journal for some reason, leaving the invoice “in limbo” … not being able to select it again for payment.

A month or so later, I want to pay the invoice in question, but cannot select it because it has been previously selected for payment…and, I can’t remember the journal on which it was selected.

So … in AX 2012, what is the procedure to remove the mark from the vendor’s open invoices?

Following link should help you: