Change multiplicity of property

[stereotype]

Class A has a property of class B.

Class B has a property of class C, with multiplicity 3. I want to change this value.

Class A is shown in a Composite structure diagram, with B and C visible.
If I right-click on C in the diagram, select Properties and try to change its multiplicity, the OK button is disabled.

Instead, I locate class B in the project browser, locate its property C, right-click, select Properties and change the multiplicity to 5. Looks ok.

In the diagram mentioned above, C is still shown with multiplicity 3. Is this really the expected behaviour? After all, class B has been updated, but class A does not seem to care...

[KP]

I've tried to reproduce your model, but the word "property" has too many meanings. It can be an attribute, a part or an association end. So:

Class A has a property of class B.

This can mean:

• A owns an attribute "att1" of type B
• A owns a part "Part1" of type B
• There is a directed association from A to B with target role named "att1"
• Something else?

[stereotype]

I'm quite new to EA and UML and, embarrassingly enough, I'm not sure but probably "A owns a part "Part1" of type B"...?

I think that the person who created the model added a new class A to a CompositeStructure diagram, and then "dragged" class B into class A and selected "Paste as: Property".