RMAN> catalog adssfdfs

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01009: syntax error: found "identifier": expecting one of: "archivelog, bac
kup, backuppiece, controlfilecopy, clone, datafilecopy, device, db_recovery_file
_dest, recovery, start"
RMAN-01008: the bad identifier was: adssfdfs
RMAN-01007: at line 1 column 9 file: standard input

RMAN>[@more@]