Diagnosis
You have not entered a value for the area '&V1&'. In Customizing, thisarea is marked as a reference area. This means, for instance, that thisarea is used in the option rate calculation and the display ofcondition rates per area.

System Response
Without an area size the system cannot take the determination of optionrates into consideration or calculate amounts per area. It is also notpossible to carry out a rent adjustment that is based on amounts perarea unit for rental units without reference areas.

Procedure
If, however, you do not want to enter any reference areas, confirm thewarning with ENTER. Otherwise enter an area.