IGNOU theory paper Passing marks for Master programme is 40%. It is 35% for Bachelor programme and you marks are below that so your marksheet show incomplete . If you are having less marks than above limit then you have to re-appear in exam or also you can reevaluate your marks.It is the same in the case of assignments you need to get 40 percent of total marks you have to pass individually both theory and assignment to pass the subject.