This avoids false positives from memory leak checking software. We recommend calling this method and it should be the last Open Inventor method called by the application. This method calls SoDB.finish(), SoNodeKit.finish(), and SoInteraction.finish().

Note: Open Inventor objects should be destroyed before you call this method.

SoWin doesn't end properly: SoWinExaminerViewer is destroyed after the finish() method has been called.

The SoWinExaminerViewer (that uses Open Inventor) is destroyed before the finish() method is called.

Reference