LHCb report to TSB held on 040225
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• Geant4 6.0 is in production:
• Gauss (LHCb simulation program) is included into the production chain: from Pythia to reconstruction saving data with POOL. Data can be saved at different stages: event generation, hits, digitization, reconstruction.
• We build Geant4 as a CMT project to keep track to modifications applied to the code between 2 releases.
• At the same time we build Doxygen documentation which is used by Gauss when we build Gauss Doxygen documentation: that allow us to navigate and to access any class from Gaudi to Geant4.
• Geant4 6.0.ref01:
  • running Gauss with this version we lost the facility to reproduce events.
• Geant4 6.0.p01:
  • running Gauss with this version we recovered the facility to reproduce events.
• Which version to use for the Data Challenge 04 (April-Mai)?
  • we will try to use the latest release but robustness is essential.