Physics list selection problem

[pvoytas]

Hi,
I've installed the latest gears (cloning the repository from github) on Debian 13.5 (as a virtual machine hosted in virtualbox on my Win 11 PC). I have also installed Geant4 11.4.1 (from source). When I tried to run the gears tutorial example in output/scoring using:
./gears
/control/execute energy.mac
it failed with this output:
`paul@debian:~/g4proj/gearproj/scoring$ ./gears

---

Geant4 version Name: geant4-11-04-patch-01 [MT] (13-March-2026)
Copyright : Geant4 Collaboration
References : NIM A 506 (2003), 250-303
: IEEE-TNS 53 (2006), 270-278
: NIM A 835 (2016), 186-225
WWW : http://geant4.org/

---

G4PhysListFactory WARNING: environment variable PHYSLIST is not defined

Default Physics Lists FTFP_BERT is instantiated

G4PhysListFactory::GetReferencePhysList <FTFP_BERT>
<<< Geant4 Physics List simulation engine: FTFP_BERT

Available UI session types: [ tcsh, csh ]
PreInit> /control/execute energy.mac
/geometry/source detector.tg
/physics_lists/select LBE_LIV_EMV
***** COMMAND NOT FOUND </physics_lists/select LBE_LIV_EMV> *****

***** Batch is interrupted!! *****

-------- WWWW ------- G4Exception-START -------- WWWW -------
*** G4Exception : UIMAN0123
issued by : G4UImanager::ApplyCommand
Command aborted (100)
Error code : 100
*** This is just a warning message. ***
-------- WWWW -------- G4Exception-END --------- WWWW -------

command </control/execute energy.mac> not found
`
If I instead comment out in the .mac file the line that sets the physics list and instead set the physics list up front using
PHYSLIST=LBE ./gears
the example runs without showing any errors.
I'm ok with setting it this way, but it seems odd that it crashes the other way.
Thanks for any help/insight,
-Paul

[jintonic]

https://github.com/jintonic/gears/tree/master/tutorials/physics#how-to-choose-a-physics-list
/physics_lists/select has been removed. The instruction on YouTube is deprecated. Sorry about that.