Message Format parse error

Question

When I am running the following I get the error Message Format Parse Error at java.text.messageformat.parse(unknown source)
Any ideas why this is please
public EventTable()throws IOException, ParseException
          super("EventTable");
          FileReader file = new FileReader("c:\\projects\\FirstSupport\\logfile.txt");
          BufferedReader inputfile = new BufferedReader (file);
          Object[] columnNames = {"Event No",
"Time Elapsed",
"Event String",
"Parameter"};
          ArrayList values = new ArrayList();
          while ((Line = inputfile.readLine())!=null)
               System.out.println(Line);
               MessageFormat mf = new MessageFormat("Event No:{0,number} Time Elapsed: {1,number} Event String:{2} Parameter:{3,number}");
                         Object[]val = mf.parse(Line);
               System.out.println(val);
               values.add(val);
          System.out.println(values.size());
          Object[][] data = (Object[][])values.toArray(new Object[values.size()][]);
          JTable table = new JTable(data,columnNames);

Answer 1

Could tabs or something make this error happen
This is the first line of the text file. Copied and Pasted
Event No: 1     Time Elapsed: 1.0     Event String: Battery voltage           Parameter: 738