if u take rman backup with exclude tablespace and restore database with this script
run {
set until time "to_date('2012-02-28 00:00:00','YYYY-MM-DD HH24:MI:SS')";
restore database;
recover database;
alter database open resetlogs;
}
u will get this error;
RMAN-06054: media recovery requesting unknown log:
u need to perform offline drop for excluded tablespace;
first of all;
rman> alter database open resetlogs;
ORA-01157: cannot identify/lock data file 39 - see DBWR trace file
ORA-01110: data file 39:
as u see data file 39 need to be droped ;
so just drop it offline;
RMAN> sql 'alter database datafile 39 offline drop';
sql statement: alter database datafile 39 offline drop
RMAN> alter database open resetlogs;
database opened
thats it..