Failed Breps union

I have several solids which I want to make one solid object , I tried to use solid union , but it fails and even the geometry disappear , Any suggestions
failed union (21.1 KB)
, thanks

it is very hard to find the components in you file, at first glance it was empty. I don’t really understand where is the component.

@laurent_delrieu Breps are internalized in brep components

in each brep components I merged several breps

I manage to bake the breps using CTRL+A and bake but components are placed very far on the canvas.