RMAN questions

[dba_admin]

I know you can sepcify "nocatalog" when launch rman:
rman nocatalog target sys/change_on_install@fddf

But, how do you specify "nocatalog" if you want to specify it after launching rman:

c:\ rman

Recovery Manager: Release 8.1.7.3.0 - Production

RMAN> nocatalog

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01005: syntax error: found "nocatalog": expecting one of: "allocate, alter, beginline, catalog, change
RMAN-01007: at line 1 column 1 file: standard input

[sambavan]

nocatalog is a command line option, you wouldn't be able to call it inside the rman.

Sam