Diagnosis
Settlement units are assigned to SETs that refer to rental units. A setcontaining one of the settlement units for the central heating system,however, is missing, with the result that the system cannot determinewhich rental units and agreements belong to this settlement unit. Theassociated costs, therefore, cannot be included in the settlementprocedure.

System Response
The central heating system cannot participate in automatic dataexchange with a settlement company.

Procedure
Check the settlement units and how they are assigned to the centralheating system.
You can create another exchange tape after you have made the necessarycorrections.