Diagnosis
Apportionment units usually belong to a rental unit. Some, howeverbelong to the rental agreement (e.g. number of persons). You shouldtherefore only enter apportionment units which are intended for arental agreement.

System Response
You have to make a correct entry.

Procedure
Enter an apportionment unit which belongs to a rental agreement. Youcan recognize which numbers these are via the F4 function, if they arenot selected. Numbers which are valid for rental units are, bycontrast, selected.