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Question G4MagInt_Driver::AccurateAdvance() Problem. 

Forum: Fields: Magnetic and Otherwise
Date: 17 Dec, 2017
From: Doris <Doris>

Hello,

I've encountered the following error message when I ran a Geant4 simulation module.

[WARNING] Geant4 exception during material lookup -- origin: G4MagInt_Driver::AccurateAdvance()
 code:GeomField1001
 description:Proposed step is zero; hstep = 0 ! 

This warning comes at the rate less then 1% of the entire events. Inside the forum threads, I found the following advice for a magnetic field problem.

http://hypernews.slac.stanford.edu:5090/HyperNews/geant4/get/emfields/146/1/1/1.html

In summary, they were suspecting an overlap in a geometry. I wonder if I'm having a similar problem.

Regards, Doris

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