Code is working, verification is failing and I have no idea why

Hello, The code is working properly, the switch statement is present and functions properly, however for some reason in the validation the last step is NOT validated and I get the following (non-sensical) recommendation : "Be sure that the main method has a switch statement based on args[0].". Does anyone understand what is happening here ? Thanks a lot

case "-i":
    synchronized (allPeople){
    int numberOfPeople = args.length - 1;
    String[] idList = new String[numberOfPeople];
    for (int i = 0; i < idList.length; i++) {
        idList[i] = args[i + 1];
    }
    for (int i = 0; i < idList.length; i++) {
        int id = Integer.parseInt(idList[i]);
        Person person = allPeople.get(id);
        System.out.print(person.getName() + " ");
        switch (person.getSex()){
            case MALE:
                System.out.print("m ");
                break;
            case FEMALE:
                System.out.print("f ");
                break;
        }
        System.out.println(new SimpleDateFormat("MMM dd yyyy", Locale.ENGLISH).format(person.getBirthDate()));
    }
    break;
}