how to cancel running rman recover databse

Hello,

I am restoring a databse to another datacenter using the followings:

rman target / catalog rman_user/paswd@ormcvjp1.sbc.com cmdfile restoreTAFp2DB.rst log restoreTAFp2DB.log

my cmd file is:

$ cat restoreTAFp2DB.rst

set dbid=1691360255;

run {

allocate channel 't1' type 'sbt_tape'

PARMS='SBT_LIBRARY=/usr/openv/netbackup/bin/libobk.so64,ENV=(NB_ORA_SERV=ssprd228-ebr.sddc.sbc.com,NB_ORA_CLIENT=p1qcc1d2-ebr.sddc.sbc.com, NB_ORA_POLICY=p1qcc1d2_ora,NB_ORA_SCHED=Default-Application-Backup)' ;

set until time "to_date('2016 APR 19 20:00','yyyy mon dd hh24:mi')" ;