Problem 736

I am trying to simulate electron-like particles with different masses, charges
and so on.  Using ExampleN03 as a base, I added in new source and header files
which are just the electron files with the name changed.  Everything works fine
when the mass is large (eg 1 GeV) but if I use the normal electron mass then I
get the following error on running:

phot:  Total cross sections from Sandia parametrisation.
G4ProcessManager::GetAttribute(): particle[m-]
  index out of range
  #processes[2]  index [-1]
G4ProcessManager::GetAttribute(): particle[m-]
  index out of range
  #processes[2]  index [-1]

Segmentation fault

(m- is the name of my new particle).  The error occurs only when the mass drops
below about 10 MeV.  If the mass is larger than this then the charge can be
changed without any problems.

The PhysicsList file I am using is exactly the same as the N03 example, but with
my new header included and the line

G4MyParticle::MyParticleDefinition();

in ConstructParticle() above the ConstructBosons() etc.

I am using Geant4 7.0.p01 on Mandrake Linux 10.1 with g++ 3.4.1.

Thank You,
Giles Reid