Rebate arrangements are frequently agreed for a period of one year. At the end of this period, all relevant business volume data must be available in the system so that subsequent settlement can be performed.

You can use this function to transfer the relevant documents from your legacy system, so that they can be used in subsequent settlement.

You can import the existing business volume data via pro forma vendor billing documents. This procedure has the following advantages:

• A separate document is created in the system. The updating of business volume is carried out on the basis of this document. The system records the result of condition record determination in the document conditions, and registers the update in an index.

• You can use the detailed statement to monitor the imported business volume data.

• You can carry out a recompilation of business volume data using the vendor billing documents that are created, without having to import a business volume data file again.

• The functions for retrospective updating of business volume are also available for external business volume data, because the system can manage the updates using the index data that is created.

Function module BAPI_SINGLEREMUREQS_CREATEMULT (general interface for creating vendor billing documents) is available for creating pro forma vendor billing documents. Choose a vendor billing type of settlement type Pro forma billing document (field TMFK-ABART).

Program LWN01F05 contains an example of calling the general interface for creating vendor billing documents.