SAP Message >3603 - No business area available in installment plan

Diagnosis
You have chosen original items that are all to be included in aninstallment plan. These original items are assigned to differingbusiness areas. However, the installment plan is not assigned to anybusiness area.

System Response
Processing can be continued.

Procedure
Contact your system administrator.
In order to avoid this warning, you need to provide a business area inthe installment plan, using the FI-CA event 3000.