error in DM520

  • please help me ...
    not install image oe2.5 on dm520 ... error consol :

    Code
    [*] Mounting '/dev/ubi0_0' to '/mnt'[*] Mounting 'tmp' to '/mnt/tmp'[*] Creating /tmp/tmp.zIujUr/settings.tar.gz from /mnt[*] Unmounting '/mnt/tmp'[*] Unmounting '/mnt'[*] Removing volume 0 from /dev/ubi0ubirmvol: error!: cannot UBI remove volume          error 30 (Read-only file system)Fatal: Failed to remove UBI volume

    with recovery online not working ....
    why?