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G4MagIntegratorDriver error [message #7710] Wed, 21 January 2009 15:35 Go to previous message
Tobias Stockmanns is currently offline  Tobias Stockmanns
Messages: 489
Registered: May 2007
first-grade participant
From: *ikp.kfa-juelich.de
Dear PandaRooters,

since my last update of pandaRoot from SVN I am getting the following error-message when I run runMvdSim.C before my root system stops working:

G4MagIntegratorDriver::OneGoodStep: Stepsize underflow in Stepper
Step's start x=7.74619 and end x= 7.74619 are equal !!
Due to step-size= 2.28754e-16 . Note that input step was 0.228754

This happens for various event generators and sub-detectors.

With GEANT3 everything seems to run smoothly.

Has anyone an idea what is going wrong?

Thanks

Tobias

P.S.: At a different run I got the following more complete error message:
G4MagIntegratorDriver::OneGoodStep: Stepsize underflow in Stepper
Step's start x=1.05216 and end x= 1.05216 are equal !!
Due to step-size= 2.10975e-17 . Note that input step was 0.0210975
G4ParticleChange::CheckIt : the Momentum Change is not unit vector !!
Difference: 1
G4ParticleChange::CheckIt
-----------------------------------------------
G4ParticleChange Information
-----------------------------------------------
# of 2ndaries : 0
-----------------------------------------------
Energy Deposit (MeV): 0
Non-ionizing Energy Deposit (MeV): 0
Track Status : Alive
True Path Length (mm) : 1.07
Stepping Control : 0
Mass (GeV) : 0
Charge (eplus) : 0
MagneticMoment : 0
: = 0*[e hbar]/[2 m]
Position - x (mm) : 658
Position - y (mm) : 740
Position - z (mm) : 3.4e+03
Time (ns) : 13.4
Proper Time (ns) : 0.0617
Momentum Direct - x : 0
Momentum Direct - y : 0
Momentum Direct - z : 0
Kinetic Energy (MeV): 22.7
Polarization - x : 0
Polarization - y : 0
Polarization - z : 0
Touchable (pointer) : 0xdfd1cd8

*** G4Exception : 200
issued by : G4ParticleChange::CheckIt
momentum, energy, and/or time was illegal
*** Event Must Be Aborted

 
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