DB13 Backup error

Hello Dear,

I am trying to take back on network disk through hp- ux sap through DB13.

I mounted the disk and permission is ok.

after completing of 65 % backup, Error is coming like permission denied as-

BR0204I Percentage done: 65.50%, estimated end time: 22:15

BR0001I *********************************_________________

BR0252E Function stat() failed for '/back/bepwsipl/sr4.data22#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#2#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C.Z' at location

BR0253E errno 13: Permission denied

BR0273E Determination of file status for /back/bepwsipl/sr4.data22#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#[D#2#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C#[C.Z failed

Please help me.

Thanks

Santosh Dwivedi