When running nwsetup-tui on the NW server during the virtual host upgrade from 10.6.6 to 11.3, the program cannot find "netwitness-18.104.22.168.zip" which is in the optical drive I tried both without unzipping and after unzipping.
I also tried without mounting it, mounting it to /media and mounting it to /mnt. I don't know where the program is searching and I couldn't find any procedure how to do it. The upgrade procdedure only explains how to set-up an external repo on a web server. For how to set-up a local repo, I only found procedure on how to do it from the UI (which I don't have access yet).