Note: I’ve posted this issue in “Recording, Visualizing and Persisting Data” last week, but did not receive any feedback. Now re-posting in “Particles, Track, Event, Run and Biasing”
Hi all,
In our Geant4 based program we are taking advantage of the Scoring Meshes functionality. When the number of meshes defined in the code becomes more than G4PathFinder::fMaxNav
(static const value of 16) then following exception is triggered:
-------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : GeomNav0002
issued by : G4PathFinder::PrepareNewTrack()
Too many active Navigators / worlds.
Transportation Manager has 17 active navigators.
This is more than the number allowed = 16 !
*** Fatal Exception *** core dump ***
G4WT2 > G4Track (0x7f9ab06abe20) - track ID = 1, parent ID = 0
G4WT2 > Particle type : e- - creator process : not available
G4WT2 > Kinetic energy : 1 GeV - Momentum direction : (0,0,1)
G4WT2 > Step length : 0 fm - total energy deposit : 0 eV
G4WT2 > Pre-step point : (0,0,-1010) - Physical volume : World (G4_AIR)
G4WT2 > - defined by : not available
G4WT2 > Post-step point : (0,0,-1010) - Physical volume : World (G4_AIR)
G4WT2 > - defined by : not available
G4WT2 > *** Note: Step information might not be properly updated.
G4WT2 >
-------- EEEE -------- G4Exception-END --------- EEEE -------
Instead of posting our program code here I reproduced the issue in one of Geant4 examples. Namely, /extended/runAndEvent/RE03
. Example takes advantage of a maximum of 3 scoring meshes. However, if we define more that 16 scoring meshes in the macro file the executable throws same exception.
I attach the modified macro file here:
run_my.txt (5.9 KB)
To reproduce the error please compile the above example and run RE03 run_my.txt
My questions are following:
- Is having a maximum of 16 scoring meshes is intended or is a Geant4 bug?
- If behavior is buggy can anyone suggest a workaround?
Issue reproduced on: Geant 4.10.07.p01, gcc 10.3.1, Fedora 33. Geant 4.10.06.p02, gcc 9.2.0, CentOS 7.7
Issue reproduced on: Geant 4.10.07.p01, gcc 10.3.1, Fedora 33. Geant 4.10.06.p02, gcc 9.2.0, CentOS 7.7
P.S.: exception is fired from file G4PathFinder.cc:367
. I tried to debug this issue but the IDE is not hitting my breakpoints - probably because G4TransportationManager
has an inline definition file .icc
.