Option Workshop may produce various events during its work, such as information messages, errors and so on. All those events may be viewed using Event Log window.
To open Event Log window you should click 
in the main toolbar. The following window will appear:
All events generated by Option Workshop during the current session are displayed in the table. You may view the details of each event by selecting it; the detailed description will then appear in the details pane on the bottom of the window.
Overview
Content Tools