Welded parts BOM Structure Design

Hello

I am looking to create a nomenclature of the parts generated with the Structure Design workshop. Let me explain: I create a skeleton on which I create the parts of my structure, only, there are some parts that are identical, but Catia creates an independent CatPart for each one. As a result, in my nomenclature, I have as many parts as instances, whereas I would like to have only a list of unique parts with their number.

I hope my explanation is clear. No matter how much I search in Catia and on the forums, I can't find an answer. I know it's possible with SolidWorks (welded parts list), and I find it hard to imagine that it's not possible with Catia. 

Otherwise, the solution would be to draw only the unique parts in Structure Design and make copies in Assembly Design (to be assembled later), but the waste of time would be enormous.

If anyone has an idea, I'm all for it.

Thanks in advance

 

No one has an idea? It would be very practical...