Dear BAEK,
You can use for analysis Draw command :
pload ALL
restore cloud.brep s
checkshape s
##On Shape faulty_1 :
##BRepCheck_UnorientableShape
##Shape faulty_2 on shape faulty_1 :
##BRepCheck_NotClosed
##Faulty shapes in variables faulty_1 to faulty_2
or BRepCheck_Analyzer class.
Regards