SAP Message ACE021 - No standard accrual method exists for accrual type &1

Diagnosis
The system is creating or changing an accrual object in the AccrualEngine. However, the Accrual Engine does not set an accrual methodhere. In cases like this, at least one default accrual method must bedefined in the Accrual Engine.

System Response
No default accrual methods have been defined.

Procedure
Change Accrual Engine Customizing accordingly.