Diagnosis
The function "Interpretation of points of time in the calendar" cannotbe combined with sceduling.

System Response
You can use scheduling to determine that the beginning of the period orthe end of the period are interpreted as availability dates for periodlot-sizes - as opposed to the default that the first requirement withinthe period is interpreted as the availability date.
As this involves the scheduling of the availability date, thisindicator cannot be combined with the indicator for the "Timeinterpretation for calendar as delivery dates".