RMAN-00600: internal error, arguments [8201]

Hi;

On 10.2.0.3 I had registered a database and tried to made a backup, I got underneath error message :

 RMAN> backup database;

Starting backup at 06-SEP-10
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=190 devtype=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 09/06/2010 09:46:01
RMAN-00600: internal error, arguments [8201] [] [] [] []

Could you please let me know what exactly is this issue and the solution ?

thanks in advance

BR

Mean