Geant4 6.1 Release Notes
March 25th, 2004

The code and binary libraries for the supported systems are available through our Source Code Web page.

Please refer to the Geant4 User Documentation for further information about using Geant4.


  1. Supported and Tested Platforms
  2. AIDA and CLHEP
  3. Compiler Specific Problems
  4. Known Run-Time Problems
  5. Compilation Warnings
  6. Known Run-Time Warnings
  7. Major items for migration of user code
  8. Detailed list of changes and fixes

1. Supported and Tested Platforms

Official platforms: More verified configurations: Platforms configured but not tested and not supported:


Geant4 6.1 requires the installation of CLHEP.
Tests have been performed with CLHEP-

Geant4 6.1 examples with histogramming cowork with AIDA 3 implementations. These include: AIDA headers can be downloaded from:

3. Compiler Specific Problems

4. Known Run-Time Problems and Limitations

For a complete list of outstanding run-time problems and to submit any problem you may find running this version of Geant4, please refer to the Geant4 Problem Reporting System.

5. Compilation Warnings

There may be compilation warnings on some platforms. We do not believe that any will lead to incorrect run-time behaviour.

6. Known Run-Time Warnings

The following messages can be written to error output while tracking. We believe none give rise to incorrect behaviour.
    G4PropagateInField: Warning: Particle is looping 
    -  tracking in field will be stopped. 
       It has performed 1000 steps in Field while a maximum of 1000
       are allowed. 

7. Major items for migration of user code

There not known migrations necessary if upgrading from release 6.0, other than recompilation and/or reinstallation of libraries and user applications.

8. Detailed list of changes and fixes

These are the main new features/fixes included in this release since the last patched public release (for the detailed list of fixes/additions, please refer to the related History files provided in most packages):


Digitization & Hits


Electromagnetic Processes (Low-energy)

Electromagnetic Processes (Standard)

General Processes, Parameterisation, Cuts, Decay, Optical



Hadronic Processes



Run, Intercoms and Interfaces


Hadronic physics-lists