@Override
	public void recreate() {
		try {
			if (formula == null)
				formula = new String[] { "0" };
			setFormula(formula);
		} catch (ConnectException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}