RMAN Restore failied with RMAN-06023

 Hi,

I copied RMAN backup files (September 13th and 14th ) to my RMAN regular backup location. Now I tried the duplicate the database from those backup files on test server, I am getting the following error messages:

RMAN-06023: no backup or copy of datafile 180 found to restore
RMAN-06023: no backup or copy of datafile 179 found to restore
RMAN-06023: no backup or copy of datafile 178 found to restore
RMAN-06023: no backup or copy of datafile 177 found to restore

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Script I am executing on the production server:

run
{
set until time "to_date('09/14/09 06:00:00','mm/dd/yy hh24:mi:ss')";