GBJ 3.0 introduced a new feature to allow enabling of diagnostic debugging messages using the new GbjGciPreferences class. To see details of this, execute:
> java com.gemstone.gbjgci.GbjGciPreferences help
This feature does not work properly in GBJ 3.0 but is fixed in 3.1 and later.
Upgrade to 3.1 or later.
Last updated: 6/23/16