Serialization Using the Queue
Counter
During "Commit Work" time, the qRFC Manager sets a counter that is used to serialize the processing of LUWs in one or more queues.
The sequence of these qRFC calls within a LUW is guaranteed when using the same destinations and queue names. Even if the RFC calls use the option AS SEPARATE UNIT in the same LUW, if they use the same queue, they are serialized according to the sequence in which they are called.