|Message: Run Geant4 + Geant4e simultaneously||Not Logged In (login)|
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I'm actually trying to improve a tracking software for the Belle-II experiment. I want to do track extrapolation with Geant4e error propagation. This is because the old extrapolation package is still based on Geant3/Geane which is too unprecise and uses a different geometry format.
For developing and testing reasons I made a Geant4 program which produces hits in a simple detector construction, and hands them over to the fitting/extrapolation software (GENFIT). This works great for the old version based on Geane.
But if I now try my own version updated to Geant4e, it throws exeptions like
*** G4Exception : RunInitializationAtIncorrectState issued by : G4RunManagerKernel::RunInitialization Geant4 kernel not in Idle state : method ignored. *** This is just a warning message.
when doing G4ErrorPropagatorManager::GetErrorPropagatorManager()->InitGeant4e(); in the constructor of the class responsible for extrapolation;
ERROR - G4ErrorPropagator::PropagateOneStep() Called before initialization is done for this track. Please call G4ErrorPropagatorManager::InitGeant4e().
*** G4Exception : InvalidCall issued by : G4ErrorPropagator::PropagateOneStep() Called before initialization is done for this track! *** Fatal Exception *** core dump ***
*** G4Exception: Aborting execution ***
when trying to do the propagation.
So, how can I fix this to work properly? I've already heard that it's a bit tricky to use G4 and G4e simultaneously... there seem to be needed different PhysicsLists and a detector without sensitive parts. Does anyone know how to do that in detail?
Thanks for the effort..! Regards, Phil