From: John Stone (
Date: Thu Mar 21 2013 - 11:12:02 CDT

Hi guys,
  The long standing issue with 64-bit builds of VMD on windows has
to do with the libraries that are needed. I would do the compilation
with the MS compilers rather than minGW or cygwin as they historically
had issues with OpenGL, but you can certainly give it a try if that's
what you have to work with. The major issue has always been getting
a correctly functioning Tcl/TK+FLTK, once that is sorted, the rest
is mostly easy. The other issues on 64-bit Windows will be that
the drivers for the Spacenavigator that we have been using aren't
supported for 64-bit mode, and similar issues for other (optional)
libraries. The only things you _must_ have working to get VMD up
and running on Windows are Tcl/TK and FLTK, the rest could be dealt
with later. I'm out of town at the GPU Tech. conference until next
week, but I am happy to work with you guys on this when I return.
In particular, I would suggest trying Tcl/Tk 8.6.0 and see if you
can get that build on 64-bit Windows and we can go from there.

  John Stone

On Wed, Mar 20, 2013 at 02:12:34PM +0100, Ajasja Ljubeti?? wrote:
> Hi Jernej!
> Have you searched the mailing list? It's a popular request, that went
> unheeded up to now:)
> You can try compiling with minGW, it should not be that bad, but the devil
> is in the details. I have not managed yet, as I did not have a strong
> enough incentive. We can also try to work something out together next
> week.
> Regards,
> Ajasja
> On 20 March 2013 03:18, Jernej Zidar <> wrote:
> Hi.
> Are there plans for a 64-bit version of VMD?
> At work we have a workstation used only for visualizations but it
> unfortunately runs Windows 7 Ultimate and on several occasions I had
> VMD crashing on me when I tried to visualize a large trajectory. I can
> visualize the same trajectory in 64-bit VMD under Linux tho.
> I also understand compiling code under Windows must be a real pain...
> Thanks for any information,
> Jernej

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