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Forum: Installation and Configuration
Re: Question Is Geant4 64-bit clean? (Tom Roberts)
Date: 11 Jan, 2012
From: Gabriele Cosmo <Gabriele Cosmo>

Hi Tom,

as also mentioned in the release notes, Geant4 is fully tested on 64-bits
platforms and for all supported flavors (MacOSX, Linux-SLC5 and Windows).
MacOSX Lion is supported starting from release 9.5.
You may want to verify this by running any of the examples/applications
shipped with the distribution.

Cheers, Gabriele

On Tue, 10 Jan 2012 20:14:46 GMT, Tom Roberts wrote:
> I am using Geant4 9.4 patch03. My program builds and passes all tests in
> 32-bit mode on Linux, Windows, and Mac OS X.
> I am trying to get it to work when compiled in 64-bit mode on Linux (SLF
> 5.5-64) and Mac OS X (Lion, 10.7.2). It builds fine, but fails about 20%
> of my tests, identically on Linux and Mac. The 32-bit builds run
> correctly on these 64-bit OSs. I have not tried 64-bit Windows, as that
> platform is always more difficult.
> Looking at the first failure, the cause is that a track never entered a
> volume that is right in its path, it just kept tracking in the World.
> This works correctly in all three 32-bit builds.
> This is a failure of very basic Geant4 operation. It certainly is
> possible that the problem is in my code, but I thought I'd ask before
> digging into a difficult and subtle problem.
> Has anyone gotten Geant4 working reliably when built for 64-bit Linux or
> Mac?

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