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Mass processing refers to bundling IDocs into packets that are then dispatched and processing in the receiving SAP system. Only one RFC call is needed to transfer several IDocs. Performance is considerably better if you dispatch optimal packet sizes.

To set mass processing parameters, in ALE Customizing choose: Start of the navigation path Modeling and Implementing Business Processes Next navigation step Partner Profiles Next navigation step Generate Partner Profiles End of the navigation path. For a given message type you can define the outbound parameters, packet size and processing mode.

If the processing mode is set to Collect IDocs and transfer, outbound IDocs of the same message type and receiver are sent in a scheduled background job in an appropriately sized IDoc packet. The IDocs can be dispatched in a scheduled background job or in ALE Administration.

Some distribution scenarios cannot support mass processing of inbound IDoc packets. This is especially true if the application sending the IDocs uses the ABAP command CALL TRANSACTION USING. In this case the outbound parameter PACKETSIZE must be set to "1".

You can find a list of function modules for mass processing in ALE Development by choosing Start of the navigation path IDocs Next navigation step Inbound processing Next navigation step Function module Next navigation step Define attributes (BD51) End of the navigation path. These function modules have input type 0.