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Re: Geant4 floating point exception [message #4801 is a reply to message #4799]

Thu, 02 August 2007 11:30

Sebastian Neubert
Messages: 282
Registered: March 2006
Location: Munich

first-grade participant

From: *e18.physik.tu-muenchen.de

Hi florian!

I came to the samer conclusion concerning the UrbanMsc.
I tried to just run G4 4.9 yesterday, but somehow the libraries seemed to have changed. I got some dynamic link problems.

Then I looked a little bit closer to the UrbanMsc and I found out that the error occurs when

a) the steplength is smaller than stepmin (in ComputeGeomPathLength)

and

b) the steplength is larger than 0.05*currrentRange (in SampleCosineTheta)

This surely appears to be an exotic case, but it leads to an inconsistency in the calculation of tau which culminates in a division by zero.

I have to admit that I can only guess what all the variables mean. So at the moment I have to think about what would be a reasonable fix.

Cheers! Sebastian.

Sebastian Neubert
Technische Universität München
Department Physik E18
sneubert@e18.physik.tu-muenchen.de
tel: +49-8928912592

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[Message index]

		Geant4 floating point exception By: Sebastian Neubert on Wed, 01 August 2007 12:07
		Re: Geant4 floating point exception By: StefanoSpataro on Wed, 01 August 2007 12:11
		Re: Geant4 floating point exception By: asanchez on Wed, 01 August 2007 12:42
		Re: Geant4 floating point exception By: Sebastian Neubert on Wed, 01 August 2007 13:07
		Hypernuclei simulation status By: asanchez on Wed, 01 August 2007 14:58
		Re: Geant4 floating point exception By: StefanoSpataro on Wed, 01 August 2007 13:50
		Re: Geant4 floating point exception By: Sebastian Neubert on Wed, 01 August 2007 14:09
		Re: Geant4 floating point exception By: Florian Uhlig on Wed, 01 August 2007 14:23
		Re: Geant4 floating point exception By: Sebastian Neubert on Wed, 01 August 2007 14:53
		Re: Geant4 floating point exception By: StefanoSpataro on Wed, 01 August 2007 15:06
		Re: Geant4 floating point exception By: Sebastian Neubert on Wed, 01 August 2007 15:39
		Re: Geant4 floating point exception By: Florian Uhlig on Thu, 02 August 2007 10:52
		Re: Geant4 floating point exception By: asanchez on Thu, 02 August 2007 11:24
		Re: Geant4 floating point exception By: Florian Uhlig on Thu, 02 August 2007 11:39
		Re: Geant4 floating point exception By: asanchez on Thu, 02 August 2007 11:45
		Re: Geant4 floating point exception By: Florian Uhlig on Thu, 02 August 2007 12:15
		Re: Geant4 floating point exception By: asanchez on Thu, 02 August 2007 11:48
		Re: Geant4 floating point exception By: Florian Uhlig on Thu, 02 August 2007 12:18
		Re: Geant4 floating point exception By: asanchez on Thu, 02 August 2007 12:42
		Re: Geant4 floating point exception By: Florian Uhlig on Thu, 02 August 2007 13:48
		Re: Geant4 floating point exception By: asanchez on Thu, 02 August 2007 13:54
		Re: Geant4 floating point exception By: Sebastian Neubert on Thu, 02 August 2007 11:30
		Re: Geant4 floating point exception By: Florian Uhlig on Thu, 02 August 2007 18:15
		Re: Geant4 floating point exception By: asanchez on Wed, 01 August 2007 12:38
		Re: Geant4 floating point exception By: Florian Uhlig on Wed, 01 August 2007 13:04

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