@dave r said:
I think you're expecting something this plugin doesn't do nor is it intend to do. This plugin doesn't modify the existing entity it just creates a new one which is the face on the section plane. If you expect to end up with the entity actually cut, you need Zorro instead.
Thank you Dave, that worked almost perfectly for me, the only bad thing is that I have to fill every wall to get a black filled effect when I uses de Section Cut, and also when I do a manual cut the SketchUp crash, I don't know why... 