When configuring SAP Workflow Extended Notifications in transaction SWNCONFIG you have to specify run schedules for both the selection of work item notifications (“Schedule Selection”) and the delivery of notifications (“Delivery Schedule”). Each schedule has a start time, end time, and interval.
The start time is required while the end time is optional. So, what happens when you specify a start time without an end time?
You might assume as I did that the schedule will run at the specified interval from the start time to the end of the day. In actuality though, SAP ignores the interval and runs the schedule once at the start time. If you want the interval taken into account you must specify both the start and end time.