How to restore controlfile from a NOCATALOG database backup.

And just to make matters worse, this is an 8.1.6.4 database.

I need to recover a database that is backed up via rman with NOCATALOG.

How do I tell rman where to find the backups of the controlfile?

From the Oracle 8 docs, the only example I see for recovering the controlfile  is "RECOVER CONTROLFILE".

When I issue it I get:

RMAN> run {

  allocate channel d1 type disk;

  restore controlfile;

  alter database mount;

  release channel d1;

  }

2> 3> 4> 5> 6>

RMAN-03022: compiling command: allocate

RMAN-03023: executing command: allocate

RMAN-08030: allocated channel: d1

RMAN-08500: channel d1: sid=8 devtype=DISK

RMAN-03022: compiling command: restore

RMAN-03022: compiling command: IRESTORE