John, the memory requirements for ValueGridPortrayal3D and
ObjectGridPortrayal3D are ghastly, due to certain of Sun's inefficient
design mistakes in Java3D.  As discussed in the README file for
sim/app/particles3d, you need to increase Java's default memory heap.
It doesn't matter that your machine has 512 megs of memory: Java always
tops out with a small heap (20 megs or so is not uncommon).  You can
increase the heap by running Java differently.  On a Mac or OS X, it's
done like this:

        java -Xmx200m

I cannot say how to do it on Windows.


On Aug 3, 2005, at 9:24 AM, John Smith wrote:

>>  I am a new user of Mason software. I run the
>> package. However, my computer can not only show the 3D visualization,
>> but it generates the following information.
>>  Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError:
>> Java heap space
>>  I am wondering to know if my memory is exhausted by this program
>> ValueGridPortrayal3D class. If I still want to run 3D program, could
>> you give me some recommendation to my computer? Are there
>> requirements for the hardware configuration? My computer has 512M
>> memory and 100G hard disk.
>>  Thank you
>>  Best Regards
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