These are the release notes for SLIC 2.1.0 .

Summary of Major Changes

• The number of events skipped is now printed out after skipping events.
• SLIC was updated for CLHEP 2 compatibility.
• The -h option (or printing usage) is now the default if no options are passed to the command line.
• The output from the -v (version) and -h (usage) options was cleaned up.
• The field 'geant4' to add the Geant4 version number from G4Version.hh to the autoname was added to list of possible autoname fields.
• The /physics commands were rewritten to support all physics lists packaged with v 8.2 Geant4.
• The command line parser was rewritten using getopt to be more conformant to GNU/POSIX standards. (Several Jira items follow from this.)

Bug

• [SLIC-156] - MCParticle vertices outside of tracking region.
• [SLIC-158] - Event skipping needs informational message on number of events actually skipped.
• [SLIC-162] - SLIC does not work with CLHEP 2.x versions.
• [SLIC-178] - Single macro argument with no option no longer works with new command line parser.

Improvement

• [SLIC-157] - Make -h the default option if there are no command line arguments given to slic.
• [SLIC-159] - The function EventSourceWithInputFile::skipEvents() should return the number of events actually skipped as an unsigned int.
• [SLIC-160] - Better output from selecting help/usage, version, or arguments at the command line.

New Feature

• [SLIC-173] - Add Geant4 version to list of possible autoname fields.
• [SLIC-179] - Allow usage of any Geant4 physics lists defined in $G4INSTALL/source/physics_lists/include

Task

• [SLIC-113] - Order of command-line arguments should not have any effect.
• [SLIC-161] - Rewrite command line processing using getopt.
• [SLIC-166] - Check for getopt in configure.
• [SLIC-167] - Create the getopt options string automatically based on the CommandLineOption list.
• [SLIC-175] - Some SimTrackerHits do not have corresponding MCParticles.