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None Simulation-result depending on operating system? 

Forum: Run Management
Date: 02 May, 2016
From: Andreas Jansen <Andreas Jansen>

Hello all,

I've recently encountered the problem that my simulation gives different 
results depending on wich machiene I execute the code. One runs 
Linux(Ubuntu) and the other runs Windows 7. I restore the random-seed in 
my RunAction class with the command 
"G4Random::restoreEngineStatus(fRndmLoadFileName);" and it works well if 
I run the same simulation multiple times on ONE machine. It also works 
if I switch to different PCs but with the same operating system so it 
really seems to be a problem with the operating system itself. The 
geant4 version is always geant4-10-02-patch-01.

The differences aren't that big though. For example in a simulation with 
50.000 gammas the difference  is only one gamma wich reaches/does not 
reach the detector. In the example this is the cause of ~50 missing 
detector hits.

Is that a known problem or am I missing something here?


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