No error message, but Schema Image does not appear

Document Generation
12

I really should get into Ecore it seems.
I would not know when a diagramm has been created inside LogicelComponentPkg or not. And wether this:

self.eAllContents (la::LogicalComponent).isRepresentationDescriptionName(‘Logical Component Breakdown’)

or this:

self.ownedArchitectures->filter(la::LogicalArchitecture).ownedLogicalComponentPkg.representationByDescriptionName(‘Logical Architecture Blank’).asImage()

should apply or not.
Thanks for your answer YvanLussaud.

Is there a way to predict the locations of diagrams (or elements) in the model?