RMAN ERRORS RMAN-03009 and ORA-00245

I have the following RMAN backup script on one of the nodes of a RAC (the RAC has 2 nodes):
TAG_FULL=_bkp_full_`date +%Y%m%d-%H%M%S`
TAG_CTL=_bkp_ctl_`date +%Y%m%d-%H%M%S`

rman target /<< VEOF
run {
      delete noprompt obsolete;
      backup
        check logical  
        database tag='TAG${TAG_FULL}'
           filesperset 23
         current controlfile tag='TAG${TAG_CTL}';
    }
VEOF

After I execute the command I get the following output from RMAN:

RMAN-03009: failure of backup command on ORA_DISK_1 channel at 04/01/2013 01:24:53
ORA-00245: fallo en la copia de seguridad del archivo de control; es posible que el destino est� en un sistema de archivos local