"The type Set is not generic; it cannot be parameterized with arguments <K>"

Hashtable tmp = new Hashtable();


Iterator<Integer> its = tmp.keySet().iterator();
		while (its.hasNext()) {
			Integer tid = its.next();

			DmsTransaction tx = tmp.get(tid);
			if (tx.getDocument() == null) {
				out.add(tx.getTrackId());
			}
		}