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Question G4OpBoundaryProcess Invalid Surface Normal 

Forum: Processes Involving Optical Photons
Date: 18 Jul, 2014
From: Jelena Ilic <Jelena Ilic>

Hi,

I'm working on  a geometry consisting of a metal block  filled with quartz straws  containing a liquid scintillator.  
For now, my StackingAction class is rudimentary -  I just count the number of produced optical photons.

I wanted to use the command base scorer to look at the deposited energy but I'm getting  a warning and an error message when running the code:
/-----------------------------
-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : GeomNav0003
      issued by : G4Navigator::GetLocalExitNormal()
Function called when *NOT* at a Boundary.

*** This is just a warning message. ***
-------- WWWW -------- G4Exception-END --------- WWWW -------

-------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : OpBoun01
issued by : G4OpBoundaryProcess::PostStepDoIt
G4OpBoundaryProcess/PostStepDoIt(): The Navigator reports that it returned an invalid normal
Invalid Surface Normal - Geometry must return valid surface normal

*** Event Must Be Aborted ***
-------- EEEE -------- G4Exception-END --------- EEEE -------

/----------------------

The code runs without problem if I do not invoke G4ScoringManager (please see attached *gif* file).

I have checked my geometry for overlaps and it looks OK.


Please can you tell me what could be a problem here?
I have attached my geometry file.

Thanks,
Jelena

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/07/18/07.20-23653-Slide1.gif
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/07/18/07.20-28880-DetectorConstruction.cc

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1 Feedback: Re: G4OpBoundaryProcess Invalid Surface Normal   (Gumplinger Peter - 18 Jul, 2014)
1 Note: Re: G4OpBoundaryProcess Invalid Surface Normal   (Yusuf - 18 Jul, 2014)
2 Note: Re: G4OpBoundaryProcess Invalid Surface Normal   (Yusuf - 18 Jul, 2014)
1 Feedback: Re: G4OpBoundaryProcess Invalid Surface Normal   (Gumplinger Peter - 18 Jul, 2014)
... 1 Message(s)
3 None: Re: G4OpBoundaryProcess Invalid Surface Normal   (Jelena Ilic - 19 Jul, 2014)
2 News: Re: G4OpBoundaryProcess Invalid Surface Normal   (Christoph G÷▀mann - 13 Feb, 2018)
1 None: Re: G4OpBoundaryProcess Invalid Surface Normal   (Daren Sawkey - 15 Feb, 2018)
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