Looking at the error I think you are trying to use the GLGraphics library with a Processing 2.0 beta. Am I right?
If so, the bad news is you can't do this because the GLGraphics library is NOT compatible with Processing 2.0. The good news is most of the opengl functionality from the GLGraphics library has been incorporated into Processing 2.0. See: http://codeanticode.wordpress.com/
If so, the bad news is you can't do this because the GLGraphics library is NOT compatible with Processing 2.0. The good news is most of the opengl functionality from the GLGraphics library has been incorporated into Processing 2.0. See: http://codeanticode.wordpress.com/