SAP Message UD406 - Select Create data model instead of Create data model hierarchy

Diagnosis You marked data model hierarchy and selected create. This is notpermitted, since only data models, but no data modelhierarchies, may be created. Procedure Please mark data model and then select create. You can then createthe data model in the first step. In the second step you can thenchange the data model by inserting entity types or data modelsin the hierarchy or deleting them from the hierarchy.