I tried to “cap holes” and “cap holes Ex” but it doesn’t work, I didn’t know where is the problem. when i do set one geometry it works and i get a closed brep , but when i did set multiple geometries it doesn’t work and that means i can’t count the volume. ^^
You have 2 curves on top of each other in your rhino file which causes problem. Delete one of them and your definition works.
you are right, thank you