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Forum: Fields: Magnetic and Otherwise
Re: None Problem with magnetic field from a table (Mariusz)
Re: None Re: Problem with magnetic field from a table (John Apostolakis)
Date: 27 Jan, 2008
From: Mariusz <Mariusz>

Actually I met a problem when running simulation for higher energy particles. My program gave core dump. It looks like it happend at the very end of an event.

Here is the output:

(...)
MRoot Event::Clear() Event had 5517 particles and 36687 CCells
WARNING - G4PropagatorInField::LocateIntersectionPoint()
          Convergence is requiring too many substeps: 10010
          Abandoning effort to intersect.
          Information on start & current step follows in cout.
WARNING - G4PropagatorInField::LocateIntersectionPoint()
          Convergence is requiring too many substeps: 10010
          Found intersection = 0
          Intersection exists = 1
          Start and Endpoint of Requested Step:
       Current Position  and  Direction
Step#       s        X(mm)      Y(mm)      Z(mm)    N_x     N_y     N_z   Delta|N|   StepLen  StartSafety   PhsStep
Start         0  118.79256  77.074619      -1600 -0.1061 -6.902e-05  0.9944 8.33e-16         0         15.3 Init/NotKnown
   0  361985.68 -38277.146  52.089425  358343.59 -0.1061 -6.902e-05  0.9944 8.33e-16  3.62e+05         15.3 Init/NotKnown

'Bracketing' starting and endpoint of current Sub-Step 10009 3108.2408 97.600574 76.871888 1369.5735 0.1818 -6.081e-05 0.9833 1.55e-15 0 15.3 Init/NotKnown 10010 361985.68 -38277.146 52.089425 358343.59 -0.1061 -6.902e-05 0.9944 -3.23 3.59e+05 15.3 Init/NotKnown

ERROR - G4PropagatorInField::LocateIntersectionPoint()
        Undertaken only length: 3108.240753 out of 361985.6821 required.
        Remaining length = 358877.4414

*** G4Exception : UnableToLocateIntersection
      issued by : G4PropagatorInField::LocateIntersectionPoint()
Too many substeps while trying to locate intersection.
*** Fatal Exception *** core dump ***

*** G4Exception: Aborting execution ***

zsh: abort      bin/Linux-g++/mqy

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1 None: Re: Problem with magnetic field from a table   (John Apostolakis - 28 Jan, 2008)
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