you need the j3d jars in your classpath. On my windows box they're in
C:\j2sdk1.4.2\jre\lib\ext, so maybe you're missing the '\lib\ext' part at
the end.

If you only want to run things, you can copy the jars in the MASON root
directory, or edit "start\mason.bat" and change "JAR_DIR"

Gabriel

On Mon, 12 Jan 2009 21:22:54 -0500, Mike <[log in to unmask]> wrote:

>I'm trying to get Java and MASON installed properly.  I can run most of the
>examples, but the 3D examples all crash with this error:
>
>   java.lang.NoClassDefFoundError: javax/media/j3d/Node
>
>Java is installed at:  D:\Programs\Java\jdk1.6.0_11
>j3d is installed at:   D:\Programs\Java\jdk1.6.0_11\j3d-jre
>
>   JAVA_HOME = D:\Programs\Java\jdk1.6.0_11
>   CLASSPATH = .;D:\Programs\Java\jdk1.6.0_11
>
>Other directories under JAVA_HOME include
>   colt-1.2.0
>   jfreechart-1.0.12
>
>Got the error mentioned above.  Then I tried moved j3d, colt, and jfreechart
>under:
>   D:\Programs\Java\jdk1.6.0_11\jre
>
>Got the same error in MASON on the 3D examples.  What am I doing wrong?
>Should I have a CLASSPATH that specifies every directory that contains a jar
>file?
>
>Any suggestions would be much appreciated...
>
>-Mike