Diagnosis
The system settings require the entry of a business area.
An entered business area automatically applies to the lower-levelobjects. Therefore, it is sufficient to maintain the business area atthe business entity level.
An entry in the lower-level objects (building, land, rental object, orreal estate contract) is only necessary if the business area differsfrom the higher-level object.
Changes to the business area automatically have an effect on alllower-level objects for which no business area was explicitly defined.

Procedure
Enter the business area (if possible at business entity level).