Diagnosis
The system was unable to create any correction deadlines (credit memodeadlines) for this item billing plan properly. This could be becausethe item billing plan is linked to the header billing plan and the enddate for the item billing plan is earlier than the end date for theheader billing plan.

Procedure
Check the billing plan in question. If you still want to createcorrection deadlines for this billing plan, unlink the item billingplan from the header.