>Les, > >I was referring to the ptf VM63746 > >Thanks >Alain
That is the DFSMS/VM RMS APAR that allows for MULTIUSER attach support. This will allow you to use request an RMS operation without having the device detached from another user ID. For example, you can request a library mount for a user ID and not have it detached from that ID to satisfy the mount. Best Regards, Les Geer IBM z/VM and Linux Development