Problems with basic example B1 after installation

Getting Started
1

_Geant4 Version:_10.7.3
_Operating System:_Windows 10 Pro (Version 10.0.19045 Build 19045)
Compiler/Version:
Microsoft (R) C/C+±Optimierungscompiler Version 19.37.32822 für x86
_CMake Version:_3.27.2
Visual Studio 2022

Hi everyone,

I’ve tried to install GEANT4 and run the basic example B1 by following this tutorial: https://github.com/john9francis/radiation-modeling/blob/main/Geant4-install-instructions.md

I’ve followed all the steps in the tutorial and it has worked fine. In the end, I selected exampleB1 in my visual studio project and clicked on “Set as Startup Project”. Then I clicked on “build” and it successfully created the exampleB1.exe. But when I try to run the exampleB1.exe, an error message appears and the terminal crashes.

error message:

Available UI session types: [ Win32, GAG, csh ]

-------- WWWW ------- G4Exception-START -------- WWWW -------

*** ExceptionHandler is not defined ***
*** G4Exception : UI0002
issued by : G4UIExecutive::G4UIExecutive()
Specified session type is not build in your system,
or no session type is specified.
A fallback session type is used.
*** This is just a warning message. ***
-------- WWWW ------- G4Exception-END -------- WWWW -------

-------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : PART70000
issued by : G4NuclideTable
G4ENSDFSTATEDATA environment variable must be set
*** Fatal Exception *** core dump ***

I’ve tried to the the environment variable with this:

set G4ENSDFSTATEDATA=C:/Users/Johannes/Geant4/program_files/share/Geant4-10.7.3/data/G4ENSDFSTATE

but it still didn’t run. Do you have any Ideas on how to fix this?
Many thanks in advance
Johannes

2

Apologies for the delay in replying! The issue is that the tutorial you used is for Geant4 11.1, but you’re installing 10.7.3 which is prior to support for the GEANT4_DATA_DIR variable. You’re doing the right thing in setting the G4ENSDFSTATEDATA env var, but it’s likely the path will be:

C:/Users/Johannes/Geant4/program_files/share/Geant4-10.7.3/data/G4ENSDFSTATE2.3

Note the “2.3” on the end of the path - but confirm that directory exists locally. You’ll likely need to set the other env vars for other libraries as outlined in the official install guide.

3

Thank you very much for the reply!
The “2.3” solved the problem.

4

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