Hello. I have an EMC  VNX5300. We have a few NAS CIFS and NFS shares. I backup them through NDMP to a TSM server on a physical library. I have a Quantum iscalar 80 robotics. everything works fine. I would like to use the VNX5300 embedded VTLU in the same manner. I defined the library as a vtl one. I used the example for TSM in page 20 of the Configuring NDMP Backup On Disk on VNX 7.1. I have an issue when I create a path to the libray with the command : define path VNX1 TESTLIB srctype=datamover desttype=library device=c0t0l0. The error message is : ANR8418E DEFINE PATH: An I/O error occurred while accessing library TESTLIB. When I use a false device name, I have this error message : ANR1737E DEFINE PATH: Device name c0t0l1 specified is invalid.I suppose the the TSM server communicates well with the NDMP server but cannot manage it. Has anyone an idea how to resolve this problem ? If this is a driver problem, can I emulate my physical robotics in the embedded VNX VTLU ? Any help is appreciated. Thank you.