Diagnosis
The item is not yet ready for interest calculation. You can definethe starting point for an item's interest calculation in the settingsfor an interest key.
Among other things, you can set an interest period (time interval inwhich one interest calculation at the most can be made), and definetransfer and tolerance days.
According to one of these criteria, the item is not yet ready forinterest calculation.

Procedure
You cannot calculate interest for the item.