I know,

this is why i am trying to save the backup to the recovery catalog machine. I have 1.9Gb free on the C: drive of this machine but still I get the error

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03007: retryable error occurred during execution of command: backup
RMAN-07004: unhandled exception during command execution on channel ch1
RMAN-10035: exception raised in RPC: ORA-19504: failed to create file "H:\backup\433073047.PICIS_DB.181"
ORA-27040: skgfrcre: create error, unable to create file
OSD-04002: unable to open file
O/S-Error: (OS 3) The system cannot find the path specified.
RMAN-10031: ORA-19624 occurred during call to DBMS_BACKUP_RESTORE.BACKUPPIECECREATE

I have set up the mapping with Windws Explorer with full permissions for everyone so i assume it it ok? I am totally stumped? Any ideas anyone?

Digs.