Trying to run the application provided in the tar-file downloadable from my AFS public area, the job will crash at the first event with the following dump: G4VProcess::SubtractNumberOfInteractionLengthLeft() negative currentInteractionLength *** G4Exception: Aborting execution *** Using /tracking/verbose 6, it turns out that many 'nan' are produced starting from the calculation of the time-of-flight/position .... Running on Linux-g++ with gcc-3.2 in optimised mode (in debug-mode and/or gcc-2.95.2 it works fine instead). Based on the reference tag "geant4-05-01-ref-01" and physics-list QGCP_BIC (see README file in the tar ball).
A gamma is produced with 'nan' kinetic energy by neutron-inelastic process.
This one was fixed in 5.1, but just now the same symptom appears elsewhere again. Fix was a protection for zero particle mass in G4DynamicParticle.cc.
This particular problem is now fixed in tag "partman-V05-01-00" for particles/management, the problem was still due to negative value to sqrt computed for precision loss on mass calculation of massless particles (photons in this case). The fix will be included in release 5.2.
