I think the sbadenis solution works. You must put your welded construction in an assembly but without the removal of material and carry it out in the assembly without editing the welded construction and not propagate the removal of material to the part.
You can make your bill of materials that will be automatically created from the Weld Stock configuration by putting your removal function in the delete state
in the Weld Stock config but not in your Machining Stock config.
So you will have all your identical bodies in your nomenclature.
Indeed it works, however what we are looking for as a solution is that the uncut parts + the partially cut ones are grouped together. (In reality, in production, the parts will have exactly the same flow rates.) However, those above and below the extruction will be new parts since they will not have the same flow.
We have finally managed to open your file via the SolidWorks 2018 Cloud tool
When I opened the part file, I noticed that the welded construction function is not used in the same way as we are.
We have a profile library for our parts, so that we can change profiles more easily Then we have a sketch to remove the material.
In your file, unless I'm mistaken, it's just a "welded construction" module that is opened and then an extrusion has been made.
Finally, on the drawing, in the nomenclature we can see the 20 parts measuring the same dimension While we would need to see the 15 pieces measuring 200, the 5 measuring 52.33 and the last 5 measuring 49.84.
I do not know if our need has been understood or if it is we who have not understood your answers. I just wanted to take stock of what we understood on our side.