From: John Stone (
Date: Thu Jan 18 2007 - 01:59:41 CST

  I assume you're using the 32-bit IRIX6 version of VMD yes?
If so, then the maximum size you will be able to specify is
probably something like 2048. Try that and let me know if
that cures your problem. In reality, you may only need 1024
or so, since the CAVE shared memory arena is only used to store
the 3-D geometry of the drawn objects, and not the entire trajectory
data, for example. I don't know what the maximum arena size that
CAVElib will provide is, I've never loaded anything bigger than 300,000
atoms in the CAVE because the tremendous rendering demands on such a
large structure bring the frame rate down too far, at least on
the (now very old) Onyx2 IR3 system we have running the CAVE here.
Try 2048 or 1024 megabytes for the CAVE shared memory arena size
and let me know if you still encounter any trouble.

  John Stone

On Thu, Jan 18, 2007 at 08:35:06AM +0100, Christian Wohlschlager wrote:
> ** Reply Requested When Convenient **
> Hello !
> I try to visulizise a rather large Molecule ( ~ 50 000 Atoms ) in the
> Cave giving VMDCAVEMEM 4000 but no use i get it displayed in lines but
> as soon as i go to different Represation and do a chain
> representyation i get the error not enought Memory crash and burn. we
> have 32 GB of Main memory 8 graphic cards (we use in this 3 with vmd)
> this should ne enough.
> do you have any ideas.
> thank you
> christian

NIH Resource for Macromolecular Modeling and Bioinformatics
Beckman Institute for Advanced Science and Technology
University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
Email:                 Phone: 217-244-3349
  WWW:      Fax: 217-244-6078