public static String getWobID(int x, int y, int z) {
		try {
			if ( wobjects[x][y][z] != null ) 
				return wobjects[x][y][z].getWobID();
		} catch (Exception e) {  
	        System.out.println("BoxLoc.getWobID(): " + e);
	        return "OutofBound";
	    }  
		return "Vacant";
	}