UML Modeling Techniques > Constraints modeling > Checking a constraints diagram
  
Checking a constraints diagram
Right-click the 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 Constraint is linked to a Constraint Type (C24000).
Each Constraint Type has at least one child Constraint Type or a linked Constraint (C24001).