IN=input_transaction_code parameter for procedures

This parameter is necessary only when the application program intends to access the message queues. You cannot schedule a BMP with an IN= parameter specified against a PDIR with an associated SMB that is already scheduled and is SCHDTYP=SERIAL. Doing so results in ABENDU0457 when the BMP is scheduled.

If the IN= parameter is omitted, the BMP is treated as a batch-oriented BMP.