The ABARS backup error exit receives control during aggregate backup processing, after verification has completed successfully, when:

• An error occurs reading a data set, including a DFSMShsm control data set (CDS)
• An error occurs in allocating an small data set packing (SDSP) data set
• An error occurs while DFSMSdss is dumping level 0 DASD data sets in the INCLUDE list
• An uncataloged data set is encountered in the selection data set
• A data set fails serialization when ABARS is attempting to enqueue on the major name of ARCDSN and the minor name consisting of a data set name