http://www.mail-archive.com/ibm-main@bama.ua.edu/msg01219.html
"Code the DCB parameter, if needed. If the program does not supply all thedata control block information, make sure that the DCB parameter suppliesthe missing information."
"DD statement IN1 defines a dummy data set. The DCB parameter supplies datacontrol block information not supplied in the program. Without it, the stepmight be abnormally terminated."
