Posted by gouessej on Apr 29, 2017; 7:05am
URL: https://forum.jogamp.org/DefaultGraphicsConfiguration-cannot-be-cast-to-AWTGraphicsConfiguration-and-null-GLContext-tp4037906p4037910.html

Hi

Applets are deprecated in Java 1.9 and probably removed from Java 1.10, I fear that Java Webstart will follow a similar path later. If you plan to work on your software on the long term, I advise you to look for another deployment solution. Is your first problem reproducible without Java Webstart?

We'll need some information to reproduce your bug and a SSCCE:
http://jogamp.org/wiki/index.php/Jogl_FAQ#Bugreports_.26_Testing

Maybe there's a problem with your graphics card driver, that's why you must provide some information.