VMD-L Mailing List

From: Mortimer Hemmit (mortimer.hemmit_at_gmail.com)
Date: Thu May 04 2023 - 16:05:59 CDT

I downloaded the corresponding one from here:
https://urldefense.com/v3/__https://learn.microsoft.com/en-US/cpp/windows/latest-supported-vc-redist__;!!DZ3fjg!8ycOiUcDMOnUO9K6Ib1X5Xl6iDe-xqyvoKletXBZ2A9TPQN8STQY3QvEvwHoKMgcdijRbk9GpqbhBKzJFAtn9JbrETs$

On Wed, Feb 15, 2023 at 12:12 AM Chris Taylor <cht_at_imipolex-g.com> wrote:
>
> Thanks for this, how do you download the VC++12 DLLs?
> Chris
>
> > On 02/14/2023 2:12 PM PST Mortimer Hemmit <mortimer.hemmit_at_gmail.com> wrote:
> >
> >
> > Hi,
> >
> > Recently VMD 1.9.4a53 for 64-bit Windows has been crashing on startup
> > with an OSPRay error for me. There seem to be lots of threads about
> > this already (e.g.
> > <https://www.ks.uiuc.edu/Research/vmd/mailing_list/vmd-l/34017.html>,
> > <https://www.ks.uiuc.edu/Research/vmd/mailing_list/vmd-l/33943.html>,
> > <https://www.ks.uiuc.edu/Research/vmd/mailing_list/vmd-l/32557.html>)
> > so I won't repeat the error here.
> >
> > I think I've found the cause of the error (or at least one part of it).
> >
> > Quick summary: The embree3.dll library that ships with VMD 1.9.4a53
> > depends on the VC++12 redistributable. This is old and some newer
> > machines (like mine) might not have it installed.
> > Two possible solutions:
> > 1) Recompile embree3.dll to depend on the more modern VC++14
> > redistributable (I tested this by copying it over the dll from more
> > recent embree releases, and they let VMD start out of the box)
> > 2) Include the VC++12 DLLs with VMD or convince end users to install
> > it themselves
> >
> > More details:
> > One can check the dependencies with "dumpbin /dependents embree3.dll"
> > in developer command prompt:
> >
> > Dump of file embree3.dll
> >
> > File Type: DLL
> >
> > Image has the following dependencies:
> >
> > tbb.dll
> > MSVCP120.dll
> > MSVCR120.dll
> > KERNEL32.dll
> > ADVAPI32.dll
> >
> > and when I went to my library directories, I actually did not have
> > MSVCR120.dll installed. Installing it from Microsoft docs did the
> > trick and VMD started up normally.
> >
> > Is embree3.dll the ONLY file that poses a problem? It seems so. I
> > replaced VMD's embree3.dll with various releases of embree (namely
> > 3.2.2, 3.2.3, 3.2.4, 3.3.0, 3.5.0) and only the ones compiled with
> > VC++14 let VMD start properly, which imply that nothing else in the
> > VMD startup chain requires MSVCR120.dll and friends.
> >
> > One could probably dig further to look for other odd library
> > dependencies and prove that what's here is the real problem, or test
> > whether OSPRay actually works once VMD starts, but hopefully this
> > provides a good starting point.
> >
> > Mortimer
>