Recently we upgraded from 4.6C to ERP 2005 ECC 6.0.Since the upgrade, we have noticed an issue in ME22N. Once you perform invoice verification on a purchasing document, you can not add any new conditions or change any existing conditions. You get message V1631 - You cannot enter new delivery costs. The purchasing document has not had Goods Receipt done on it, only Invoice Receipt. I even tried reversing the Invoice Receipt and then adding/changing conditions, and it still gives me the message noted above. Please advise.