UML Modeling Techniques > Use case modeling > Use case diagrams > Checking a use case diagram
  
Checking a use case diagram
Right-click the Use Case Diagram, point to Report, and then click Consistency.
The report is generated to the Output pane.
Modeler makes the following checks:
There are items on the diagram (C1).
Each Actor has a connection on the diagram (C20029).
Each Use Case has a connection on the diagram (C20030).