duplicate database from active with until time

Hi all

May i do the duplicate from active database with until time option,, obviously i will have all the archive log file available..or maybe i misunderstood the concept

Let me know your comments, This is what I'm pretending to do

sacux134:BE1Y1 #more be1p1restore.rcv

connect target sys/Ling_221@BE1P1

connect catalog rman11gr2/rman11gr2@gl1p9

connect auxiliary sys/oracle

run {

set until time "to_date('19-JAN-2015-04:00:00','DD-MON-YYYY-HH24:MI:SS')";

duplicate target database to be1y1 nofilenamecheck from active database;

}

Jesus