Raju, IDoc re-packaging is a mechanism to keep packaged processing of IDoc messages in a PI system in case when a sender application system uses IDoc packaging and package size in a sender application system and a PI system shall be different. This is especially helpful for high volume interfaces. Let's assume a sender application system uses IDoc packaging in order to optimize IDocs processing and delivery to a PI system, and sends up to 100 IDocs per RFC call. Let us also assume that we would like to optimize corresponding messages processing in PI by beans of packaged processing (splitting RFC call with 100 IDocs in individual messages and getting 100 XI messages is not an option for us in this example, due to performance considerations), but handling a single XI message that will contain data of received 100 IDocs may cause generation of too large messages within PI, and we would like to split original package into smaller chunks (for example, compose XI messages that will contain data for up to 20 IDocs). To achieve this, IDoc re-packaging option in IDoc sender communication channel is enabled - namely, an option "Multiple IDocs in Single XI Message" is activated and maximum number of IDocs that shall go into a single XI message is specified (in our example, "Number of IDocs in Single XI Message" = 20).
Regards,
Vadim