I have looked at other posts on this forum to try and get clues for what might be the problem and how to fix it. In this linux post it is mentioned in one of the command line outputs that some the graphic systems available are:
ASCIITree (ATree) DAWNFILE (DAWNFILE) G4HepRep (HepRepXML)
G4HepRepFile (HepRepFile) RayTracer (RayTracer) VRML1FILE (VRML1FILE)
VRML2FILE (VRML2FILE) gMocrenFile (gMocrenFile)
ASCIITree, G4HepRep, RayTracer, and gMocrenFile are important because the file names are similar to the files that were mentioned in the error messages. This means that the problem might have something to do with the graphic systems. I know this probably doesn’t help much but at least it is a step forward in isolating the problem. I’m not entirely sure if there is a set of commands in the installation guide that I need to use from the Building and Installing (Geant4 Build options) section and /or the Post Install section and /or How To Use The Geant4 Toolkit Libraries section. I didn’t use any commands from those sections to get to where I am now.
Any help or suggestions on how to proceed would be greatly appreciated!