I tried to run the delete obsolete commands, this is what Im getting:

RMAN> delete noprompt obsolete expired backup;

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01009: syntax error: found "expired": expecting one of: "device, high, orph
an, redundancy, recovery, ;, until"
RMAN-01007: at line 1 column 26 file: standard input

RMAN>

WHat is it looking for?

Paul