|Message: Re: exampleB4 can't execute histograms macro||Not Logged In (login)|
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thank you very much for responding.
I very recently managed to resolve this issue after almost 2 months, and forgot to add the solution to the thread. The problem was that I had build both Geant4 and the examples in the / directory, therefore Geant4 had no permission to write the *.root file. I re-build everything in another folder and everything is running smoothly. Such a simple problem but very hard to think of what was wrong as I am new to this.