You can repair your RACF® database by directly changing its internal elements (blocks) using the RACF block update command (BLKUPD). Because this direct manipulation can result in an inconsistent and therefore unusable database structure, you must be very careful when using BLKUPD. For assistance in using BLKUPD, contact your system programmer or the IBM® support center.

For more information on BLKUPD, see z/OS Security Server RACF Diagnosis Guide.