File f = new File(location + documenturl);
		if (!f.exists()) {
			res.sendError(HttpServletResponse.SC_NOT_FOUND, "Can't read or find the requested document at location: " + location + documenturl + "\n
" + f.getAbsolutePath());
			System.out.println("-- can't read or find the requested document at location: " + location + documenturl + "\n
" + f.getAbsolutePath());
			Process p = rn.exec("ls -als " + documenturl);
			DataInputStream st = new DataInputStream(p.getInputStream());
			String buf = " ";
			boolean loop = true;
			while ((buf = st.readLine()) != null)
				res.getOutputStream().println(buf);
			st.close();
			if (p.exitValue() != 0)
				System.err.println("error !!");
			return;
		}