|Message: Re: Geant4 error propagation package in MT Frameworks||Not Logged In (login)|
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For a MT application you should use G4MTRunManagerKernel in master instead of sequential G4RunManagerKernel.
My proposal is that you take a look at G4MTRunManager and G4WorkerRunManager and try to do something similar to what is done there.
G4Region and G4ParticleTable are shared but there may be thread-local references in the code.
The error you get is due to the fact that the workers are trying to define their own geometry, while they should share it from the master thread.