At a recent client visit, the topic of exporting to the .NWC format came up. It appears you can not export the .NWC file format from 2014 AutoCAD without installing an NWC export utility. Click the link below to download the utility. Once the utility installs, the command "NWCOUT" will now be available!
P.S.Type "NWNAVIGATOR" at your command line for a great Navis Viewer!