|Message: Accuracy ERROR in G4Navigator||Not Logged In (login)|
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HI, I am trying to simulate some pyhsical process using FADS. By tracking only Muons, I don,t have any problem but simulating physics processes like higgs creation, i face an error generated by G4Navigator and the program crashes. Detail error description is given below. Could someone helps me, how to get rid of this problem. thanks ////////////////////////////////////////////// particleName : kaon- trackID: 279 processName : Transportation Accuracy ERROR found in G4Navigator::ComputeStep: The Step's starting point has moved 15583.95413 mm since the last call to a Locate method. This has resulted in moving 15584.02313 mm from the last point at which the safety was calculated which is more than the computed safety= 23.30524691 mm at that point. This difference is 15560.71789 mm. This problem can be due to either - a process that has proposed a displacement larger than the current safety , or - inaccuracy in the computation of the safety - if you are using a magnetic field, a known conflict about the safety exists in this case. We suggest that you - find i) what particle is being tracked, and ii) through what part of your geometry for example by reruning this event with /tracking/verbose 1 - check which processes you declare for this particle (and look at non-standard ones) - if possible create a detailed logfile of this event using: /tracking/verbose 6 goofy: src/G4Navigator.cc:635: G4double G4Navigator::ComputeStep(const G4ThreeVector &, const G4ThreeVector &, double, G4double &): Assertion `shiftOriginSafSq <= sqr(safetyPlus)' failed. Abort ////////////////////////////////////////////////// Regards ashfaq ahmad
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