To generate Calypso MC data from an installation (run) directory:

1. edit the G4FaserAlg/test/runG4.py file to setup the job ....the default generator is particle-gun; it can also read EVNT files but note that the Veto is far away from (0,0,0) where most ATLAS generators put things by default ....read the comments carefully as a few other things have to be changed in the job options to switch between internal generator and generator data-file

2. source ./setup.sh

3. runG4.py

(setup.sh will put the script in your path)