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On Thu, 16 May 2002, Mario Olimpio de Menezes wrote: > *** Discussion title: Run Management > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <20020516135850.GA28429@curiango.ipen.br> > Subject: ...change this to be about your reply. > > On Thu, May 16, 2002 at 05:15:51AM -0700, Makoto Asai wrote: > > *** Discussion title: Run Management > > Email replies to PublicHyperNews@slac.stanford.edu must include: > > In-Reply-To: <"/runmanage/8/1"@geant4-hn.slac.stanford.edu> > > Subject: ...change this to be about your reply. > > > > This error usually appears in case no EM process or no EM particle > > defined. Please confirm you register all necessary particle other > > than neutron and all necessary EM processes for these particles > > are properly registered. I presume you registered only neutron. > > You must register at least gamma, electron, positron and proton, > > and likely some other particles. > > I followed your suggestion and registered EM process (I believe). My > physicslist has additionally: > > // gamma > G4Gamma::GammaDefinition(); > > // leptons > G4Electron::ElectronDefinition(); > G4Positron::PositronDefinition(); > > // barions > G4Proton::ProtonDefinition(); > > and also added processes for e- e+ gamma; didn't find how to add process > for proton. > > I still have problems, that is, the same error message! > > Do I need all other particles (Muons,Neutrino,Pions,etc)? > Hi, The recommendation is simple: define all particles which will be in your simulation. If proton is incident, gamma, e+, e- should be registered as well. If other particles can be created during tracking they should be registered also. How to initialise physics processes one can find out from one of examples/novice - of course, processes should be defined only for particles of interest. VI
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