Volleyball game

[j.crater]

You still have that scorevisitor > scorehome in wrong_score which serves no purpose :)

You get this error because function match doesn't return anything.
scorehome,scorevisitor=match(Home, Visitor,i+1)
match function needs to return values that will be assigned to scorehome and scorevisitor

And about your looping until user enters proper scores, look into continue instead of break.