It has been many versions since I've suported Netware, but BEWS will not connect in any way to a Windows server without a RAWS serial installed. Similarly, unless you have a RALUS serial installed, BackupExec will not connect to a *Nix server
based on this, I'd say that you need a RANW serial installed on the media server just to connect to the Netware server at all
Don't know why it took 8 months to finally fail, but options will install as 60-day trials in v12.x