VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Mon Jan 23 2006 - 13:28:49 CST

Hi,
  The 32-bit Windows implementation of the standard library functions
such as fopen(), fclose(), fseek(), ftell(), fread(), and fwrite()
cannot handle large files (>= 2GB). This causes the DCD plugin (and others)
to be limited to working with files <= 2GB in size on Windows specifically.

In the short term (until I have a new version of the DCD plugin written
using non-portable 64-bit Windows filesystem calls), the solutions to
this problem are:
  - split the large file(s) into pieces that are 2GB or smaller using
    VMD or CatDCD on the machine(s) where the trajectory was generated.

  - Run VMD on one of the other supported platforms which have
    64-bit file support in their libc stdio implementation.

Let us know if you need help with this.

  John Stone
  vmd_at_ks.uiuc.edu

On Mon, Jan 23, 2006 at 02:15:47PM -0500, Linghao Zhong wrote:
> Hi,
>
> When I want to load a 3.2G DCD file into VMD, it says "the dcd
> contains no timesteps". A smaller DCD (3M) generated with the same
> CHARMM input can be loaded without any problem.
>
> There was an earlier post reporting the similar situation in this
> mailing list. Is there any solutions so far? Thanks.
>
> VMD version: 1.8.3
> Machine: WinXP
>
>
> _________________________
> Linghao Zhong, Dr.
> Assistant Professor
> Penn State Mont Alto
> 1 Campus Drive
> Mont Alto, PA 17237
> Telephone: (717) 749-6240
> 

-- 
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: johns_at_ks.uiuc.edu                 Phone: 217-244-3349
  WWW: http://www.ks.uiuc.edu/~johns/      Fax: 217-244-6078