The final entry in the Option Groups tree is 'Message Log'. This has little to do with the import and build arguments, but instead holds a record of the output generated from the Greenstone PERL scripts the last time the collection was built. The text area contains three types of lines: Command, import.pl and buildcol.pl. Command lines show the exact command issued to the Greenstone script. Lines beginning 'import.pl>' come from the importing phase of the collection build, and those starting 'buildcol.pl' are from the building phase.