Diagnosis
A particular combination of control fields is permitted for each baseprocedure. You have specified a combination that is not permitted forbase procedure &1.

Procedure
The following field entries are permitted:

• Base procedure 01 (for an exact number of days)

You can only control the processing of leap days.

• Base procedure 02 (month-based using a key date):

You can control the processing of leap days. You must specify bothcontrols for the move-in/move-out month; these controls must be thesame.

• Base procedure 03 (month-based using an interval):

You can control the processing of leap days. You must specify bothcontrols for the move-in/move-out month; these controls must be thesame. You must specify the controls for processing aperiodic changes andthe reference to the number of days.
The advanced interval procedure can be controlled. If you have selectedinterval procedure, you must also enter enhanced interval procedurecategory.________________________________________________________________________