Locate Processing

No STEPCATs or JOBCATs are permitted if system-managed data sets are referenced, because SMS only supports data set locate using the standard order of search. SMS does locate processing during step setup, so do not reference data sets as old that will not be cataloged until the job actually executes. If you do, the locate fails and you get a JCL error.

You can use DUMMY storage groups to minimize JCL changes for existing data sets that are located by specifying the volume. If you have placed the data set under system management and it no longer exists on the original volume or the volume no longer exists, you can add the volume to a DUMMY type storage group. When the data set is referenced (and not found), the system uses the catalog to locate the data set. However, you cannot use dummy storage groups to handle volume allocations. That is, you cannot use DD statements like:

//DD1      DD   VOL=SER=DUMMY1,UNIT=SYSDA,DISP=SHR

This type of statement (with DISP=OLD or SHR) allocates a specific volume. SMS manages data set allocations, and because this is not really a data set, SMS cannot take control of it.