rman copy across network

Hello All,

Starting out in RMAN. Created catalog db on a seperate machine and
registered target db.

On target db machine, mapped a network drive (r:)for share on
catalog db machine.

Using following command to copy data file:
run {
allocate channel c1 type disk;
copy datafile 33 to 'r:\data_file.bak';
}

I get Ora-27040: failed to create file
O/S Error: (OS 5 Access is denied)

I have checked O/S permissions to the user connected on target db
machine and have manually copied files to mapped drive.
It is working fine.

This command works well if I remove the r: i.e. mapped drive. then
by default file is copied at %ORACLE_HOME%\database folder in target
db.

I would like to know if it is possible to copy directly over the
network as there is space constraint on target db. Due to space constraint it is not possible to copy all files on target and then
transport across network.

Best Regards,

Kashif

http://metalink.oracle.com/metalink/...&p_id=145843.1