Having issue running my first example for the second time and this error message prompt up, please i do nee guidance thanks

[Abubakar_Muhammed]

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_Geant4 Version:_11.1.1
_Operating System:_linux
Compiler/Version:

having issue running the program for the second time. please i need guide. thanks

[bmorgan]

Please see the How to build an executable section of the Application Developer Guide. When building an application, cmake needs to be pointed to where the Geant4 libraries are installed.