While attempting to RACF-indicate the data set named in the message, the command processor found that the data set was already RACF-indicated. For a VSAM data set, the RACF® indicator is in the VSAM catalog. For a non-VSAM DASD data set, the RACF indicator is in the DSCB on the volume indicated in the message. For a tape data set, the RACF indicator is in the TVTOC for the tape volume indicated in the message.