Processing User Labels

User labels can be processed by IEBCOMPR, IEBGENER, IEBPTPCH, IEBUPDTE, and IEHMOVE. In some cases, user-label processing is automatically performed; in other cases, you must indicate the processing to be performed. In general, you can:

Process user labels as data set descriptors.
Process user labels as data.
Total the processed records before they are written (IEBGENER and IEBUPDTE only).

For either of the first two options, you must specify SUL on the DD statement that defines each data set for which user-label processing is desired. For totaling routines, OPTCD=T must be specified on the DD statement.

You cannot update labels by means of the IEBUPDTE program. This function must be performed by a user label processing routine. IEBUPDTE will, however, allow you to create labels on the output data set from data supplied in the input stream.

IEHMOVE does not allow exits to user routines and does not recognize options concerning the processing of user labels as data. IEHMOVE always moves or copies user labels directly to a new data set.

Volume switch labels of a multivolume data set cannot be processed by IEHMOVE, IEBGENER, or IEBUPDTE. Volume switch labels are lost when these utilities create output data sets. To ensure that volume switch labels are retained, process multivolume data sets one volume at a time.