We still support NetViz versions prior to 6.5, but licenses are no longer available.
NetViz 6.5 and 7.0 are able to read and convert older netViz projects.
Need to get older version of netViz for old projects
How to acquire copies of NetViz version 4.0 or 5.0
Will netViz 6.5 or 7.0 convert or read netViz projects created in older versions
(Legacy KB ID CNC TS14965 )