BTW, all of the 3D code is contained in the following directories:

	sim/display3d
	sim/portrayal3d
	sim/app/balls3d
	sim/app/celegans
	sim/app/crowd3d
	sim/app/heatbugs3d
	sim/app/mousetraps3d
	sim/app/particles3d
	sim/app/pso3d
	sim/app/tutorial6
	sim/app/tutorial7
	sim/app/woims3d

If you delete these directories, you'll get a version of MASON with no 3D references at all.  Be sure to remove the lines for the various 3D apps above from the sim/display/simulation.classes file or MASON will still complain (but run fine) when you launch the Console.

Sean

On Jun 7, 2012, at 6:03 PM, Axel Kowald wrote:

> Hello again,
> 
>> 
>> When you fire up the Console (typically via "java sim.display.Console"), one thing it does is try to determine all the simulation classes in your system.  These classes are defined in a file called sim/display/simulation.classes and are listed by class name.  Console tries to load each of these classes so it can display them in its list of available simulations.
>> Anyway, the #1 reason why Java can't find classes referenced by a simulation class is because it's referring to Java3D stuff and you don't have Java3D installed.  But it's possible that there may be other reasons.  
> 
> hm, when I explicitly add j3dcore.jar to the build path of my eclipse project, the error disappears. 
> That is good, but strange since it worked without this on my Laptop. And I definitely have java 3d installed because the 3D heatbugs start without problems if I start the console via mason\start\mason.bat.
> But anyway, I am not really using 3D stuff, so I will ignore this error/bug/warning and get on with my stuff :-)
> 
> Axel
> 
>