Diagnosis
You are trying to use a transaction or a program that is part of theClassic Real Estate (Classic RE) component.
However in the current client, the Flexible Real Estate Management
(RE-FX) component is active.

System Response
It is not possible to use the above components in the same client asthis may lead to a data inconsistency (for instance real estate masterdata and contract data)

Procedure
Contact your system administrator.
The menu needs to be set up in accordance with the component that isactive.

Procedure for System Administration
For further details on both of these components, refer to SAP Note443311. Or if you want to activate the Flexible Real EstateManagement (RE-FX) component, see SAP Note 460524.