I found the following message while running my simulation,
G4ParticleChange::CheckIt : the global time goes back !!
6: Difference: 0.0231658[ns]
6: G4ParticleChange::CheckIt
6: -----------------------------------------------
6: G4ParticleChange Information
6: -----------------------------------------------
6: # of 2ndaries : 0
6: -----------------------------------------------
6: Energy Deposit (MeV): 0
6: Non-ionizing Energy Deposit (MeV): 0
6: Track Status : Alive
6: True Path Length (mm) : -6.94
6: Stepping Control : 0
6: Mass (GeV) : 0
6: Charge (eplus) : 0
6: MagneticMoment : 0
6: : = 0*[e hbar]/[2 m]
6: Position - x (mm) : 0.836
6: Position - y (mm) : 0.0903
6: Position - z (mm) : 0.307
6: Time (ns) : -0.0118
6: Proper Time (ns) : 0
6: Momentum Direct - x : -0.934
6: Momentum Direct - y : 0.101
6: Momentum Direct - z : 0.343
6: Kinetic Energy (MeV): 0.0457
6: Polarization - x : 0
6: Polarization - y : 0
6: Polarization - z : 0
6: Touchable (pointer) : 0x2d854a8
6:
6:*** G4Exception : 200
6: issued by : G4ParticleChange::CheckIt
6:momentum, energy, and/or time was illegal
6:*** Event Must Be Aborted
What exactly is this message about?.
Thank you for helping.