Data windows in filters
When requesting a specific window from a filter, using the ""get_window_specs()"" call, if the window is NOT ""soft"", it fails way too often to return a window (example: data from WFJ2 from 2014-12-14 to 2014-12-31, with a ""center"" window).
The only available fix (so far) is to always use a ""soft"" window.