The command _slic -n_ will start the simulator in interactive mode, where Geant4 commands can be typed into the terminal. When you use this command, you should see the Geant4 prompt.
{format}
PreInit>PreInit>
{format}
The "PreInit" means that the geometry and physics have not been loaded, so Geant4 is in a pre-initialization state.
If you specify the geometry file with the interactive mode, then the simulator will be intialized for you.
{noformat}
slic -g mygeom.lcdd -n
{noformat}
This command should result in the idle state.
{noformat}
Idle>
{noformat}
From the idle state, it is possible to start the simulation by using the _/run/beamOn_ command, or execute other commands that are valid for the idle state. |