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Forum: Geometry
Re: Question Infinite Loop in G4SubtractionSolid::DistanceToIn() (Stefan E. Mueller)
Re: More Re: Infinite Loop in G4SubtractionSolid::DistanceToIn() (Stefan E. Mueller)
Date: 10 Sep, 2014
From: John Apostolakis <John Apostolakis>

Dear Stefan,

Sometimes a problem is created due to an inconsistency in the geometry - potentially an overlap between daughter volumes, or incorrectly placing a daughter volume so that it is actually outside its mother.

Have you by any chance checked your geometry, to make sure that such overlaps (or similar ones) are not present ? 

There are tools, which are documented in the Guide for Application Developers, which can allow you to carry out sanity checks of this type. 

If you geometry is relative simple, such a check could be quick.  Even if your geometry is rather complicated, and the test takes some time to run, it could uncover one or more issues which could be very difficult to track down otherwise.

There is no guarantee that such a geometry issue is behind the problem you are seeing.  However it is worth double checking.

John Apostolakis

On Sep 10, 2014, at 3:54 PM, "Stefan E. Mueller" <>

> *** Discussion title: Geometry
> OK,
> now I tried to run more jobs without any scoring activated. It seems
> that several of them showed the same problem (unfortunately, log files
> were lost in the process). So it might not be due to the scoring at all.
> I keep on investigating,
> Stefan
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1 More: Re: Infinite Loop in G4SubtractionSolid::DistanceToIn()   (Stefan E. Mueller - 11 Sep, 2014)
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