An incompatibility can exist between DFSMShsm and RACF® if the data set being referred to is migrated. A user with volume authority (operations authority or DASDVOL authority) for a specific volume can normally alter or delete any data set on that volume. If DFSMShsm is installed and the data set in question is migrated, the operation can fail. The user must also have data set authority for the data set that is being accessed because DFSMShsm checks the user’s authority at the data set level.