Hey Sam,
First of all, no arguement here with windows bashing, But I have to work with what they give me, Funny though!

Second, I am doing a backup to disk, and I have mapped the drive, however the backup still fails with the following errors,

RMAN-10035: exception raised in RPC: ORA-19504: failed to create file "L:/db_424782993_41_p1"
ORA-27040: skgfrcre: create error, unable to create file
OSD-04002: unable to open file
O/S-Error: (OS 5) Access is denied.
RMAN-10031: ORA-19624 occurred during call to DBMS_BACKUP_RESTORE.BACKUPPIECECREATE

RMAN> ORA-27040: skgfrcre: create error, unable to create file

I kick the job off from the server where the recovery catalog resides, so I'm not sure which server I have to change permissions on. Is it from the box which initiates the job, or the box that has the database and writes to the mapped drive?

Thanks
Frank