Webtrends Analytics 9 Adminstration Guide, November 2012
Data capture scheduling has certain limitations.
Because a data capture depends on an analysis, you cannot schedule the time and frequency when a data capture occurs. These settings depend on the settings in the profile.
You cannot create a data capture for historical data. Because data captures rely on capturing an intermediate phase of data from a temporary database, the information in a data capture can only be recovered by reanalyzing the profile data.