KO88 Unable to settle Internal Order to Cost Center or AUC

Hi all,

My client is currently using S4 Hana Finance 1503. There are costs in an Internal Order in 2016 which aren't settled yet. What are the options available to settle the costs to AUC?

Some more information about the Order:

Order is an Investment Measure

Order has costs only in 2016 which aren't settled

Asset Accounting year (OAAQ) is closed till 2016