restore standby controlfile from 'path'

hi all

my requirement is build the Readonly standby database on T5 Server. on 11.2.03

i was taken the backup from production database by using the below command from rman

backup current controlfile for standby format '/backup/PRCSN_RMANBKP/PRCSN_LEV0/stdprcro.ctl'

the backup controlfile i moved my target database (i.e my Readonly standby database)

after startup nomount from sqlplus promt

i connect to rman

rman target /

i am trying to restore the control file by using below from rman

rman>restore standby controlfile from '/archive/prcsn_bkp/stdprcro.ctl';

i am getting the below errror

RMAN> restore standby controlfile from '/archive/prcsn_bkp/stdprcro.ctl';