Posted by scott+jogamp@vorthmann.org on Feb 11, 2013; 3:44am
URL: https://forum.jogamp.org/release-tags-in-java3d-github-tp4028177p4028192.html

Ha!  That was it.  The build2.xml file says "gluegen.jar", but I downloaded "gluegen-rt.jar".  Thank you both!

Scott