public void processReturnValue(int re){
        String msg = "";
        switch(re){
            case 1: msg = "Interaction file missing!";break;
            case 2: msg = "Overlap information missing!";break;
            case 3: msg = "There is no need for correlation";break;
            case 4: msg = "Please do correlate first!";break;
        }
        if(!msg.isEmpty()){
            JOptionPane.showMessageDialog(null, msg, "Error", JOptionPane.ERROR_MESSAGE);
        }
    }