KB Article #176400
The File Download filter fails with a NullPointerException when it is called from a Policy Scheduler.
Problem
* The File Download filter fails with a NullPointerException when it is called from a Policy Scheduler.
Resolution
-- This is a known bug that will be fixed in a future release, most likely 7.4. You can work around the issue by adding an 'Add HTTP Header' filter prior to the File Download filter. The header you add does not need to be meaningful.