1. Run ATLAS Geant4 Simulation:

    AtlasG4_trf.py inputEvgenFile=<input EVNT filename> outputHitsFile=myHITS.pool.root geometryVersion=ATLAS-GEO-20-00-01 conditionsTag=OFLCOND-MC12-SIM-00 [maxEvents=<number>]

2. Run Detector digitization:

    Digi_trf.py inputHitsFile=<input HITS filename> outputRDOFile=myRDO.root geometryVersion=ATLAS-GEO-20-00-01 conditionsTag=OFLCOND-MC12-SIM-00 

3. Run Physics Object Reconstruction:

    Reco_trf.py inputRDOFile=<input RDO filename> outputAODFile=myAOD.root geometryVersion=ATLAS-GEO-20-00-01 conditionsTag=OFLCOND-MC12-SIM-00 

Need a release with at least AlpGenControl-00-00-27 or check it out locally. Just run your Generate_trf command with

--athenaopts="--config-only=test.txt"