The data set that is associated with the DDname specified on the PARMDD keyword must be a physical sequential (PS) data set. Other data set organizations are rejected and the job is failed. When using PARMDD, you must comply with the following support statements:

• Partitioned data set (PDS and PDSE) members provide the appearance of a physical sequential (PS) data set and are supported.
• UNIX System Service files also provide the appearance of a physical sequential (PS) data set and are supported.
• Other data sets that provide the appearance of a physical sequential (PS) data set are not supported.