Problem 732 - Problem (crash) with kaon0L's in G4ExcitedStringDecay
Summary: Problem (crash) with kaon0L's in G4ExcitedStringDecay
Status: RESOLVED FIXED
Alias: None
Product: Geant4
Classification: Unclassified
Component: processes/hadronic (show other problems)
Version: 6.2
Hardware: PC Linux
: P2 critical
Assignee: Gunter.Folger
URL: http://atlas.bu.edu/Monitoring/Logs/c...
Depends on:
Blocks:
 
Reported: 2005-03-24 02:31 CET by Armin.Nairz
Modified: 2005-11-23 10:22 CET (History)
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Description Armin.Nairz 2005-03-24 02:31:30 CET 
In the ongoing mass production for the ATLAS physics workshop in June 2005,
which is using Geant4.6.2.p01 (compiled against CLHEP1.8.2.1), there occurred a
rare crash (core dump) in G4ExcitedStringDecay. The two reported cases both
concern kaon0L's in Aluminium:

--------------------------------------------------------------------------------
Crash #1:

G4ExcitedStringDecay::EnergyAndMomentumCorrector - Warning
Scale not unity at end of iteration loop: 5882.2396 957.77 6.1415993
Increase number of attempts or increase ERRLIMIT
In src/G4ExcitedStringDecay.cc, line 130:
===> G4ExcitedStringDecay failed to correct...
G4HadronicProcess failed in ApplyYourself call for
- Particle energy[GeV] = 17.406078
- Material = Aluminium
- Particle type = kaon0L

*** G4Exception : 007
issued by : G4HadronicProcess
GeneralPostStepDoIt failed.
*** Fatal Exception *** core dump ***

*** G4Exception: Aborting execution ***


--------------------------------------------------------------------------------
Crash #2:

G4ExcitedStringDecay::EnergyAndMomentumCorrector - Warning
   Scale not unity at end of iteration loop: 8528.4164 957.77 8.9044513
   Increase number of attempts or increase ERRLIMIT
In src/G4ExcitedStringDecay.cc, line 130:
===> G4ExcitedStringDecay failed to correct...
 G4HadronicProcess failed in ApplyYourself call for
 - Particle energy[GeV] = 35.394779
 - Material = Aluminium
 - Particle type = kaon0L

*** G4Exception : 007
      issued by : G4HadronicProcess
GeneralPostStepDoIt failed.
*** Fatal Exception *** core dump ***

*** G4Exception: Aborting execution ***
--------------------------------------------------------------------------------
Comment 1 Hans-Peter.Wellisch 2005-07-05 06:59:59 CEST 
Gunter, can you have a look ?
Comment 2 Gunter.Folger 2005-09-27 07:39:59 CEST 
Hello,

I have spent quite some time to reproduce this problem, without success.
Please confirm that this production is using a QGS. physics list. The problem
then occurs in the hadronisation of a string produced by the QGS model modeling
the interaction of a Kaon0L.

I had rrun more than 10^6 Kaon0L through QGS in a simpler setup, and did not run
into this problem.

If you agree, I could make this a warning only?

Gunter
Comment 3 Gunter.Folger 2005-11-23 10:22:59 CET 
Fixed with tag had-hadronization-V07-01-00