In an Instance, the type of an instanciated Attribute must be part of the instanciated class or one of its parent classes.
The related Attribute of an AttributeLink must be owned by:
- the Classifier typing the Instance
- one of the parent Classifiers of the Classifier typing the Instance
If you have a slot related to an attribute that is not accessible from the instance’s classifier, you should either:
- Change the related attribute to one of the classifier’s attributes
- Make the attribute accessible to the classifier, by adding an inheritance link for example