Program: 168080
Project: 168080
Buggy source:
private boolean canItProceed(){
  form.getMessageManager().removeAllMessages();
  if (dateCheckBrowse.getSelection()) {
    if (browseDay.getSelectionIndex() == 0 && browseMonth.getSelectionIndex() == 0 && browseYear.getSelectionIndex() == 0) {
      form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
      return false;
    }
 else     form.getMessageManager().removeMessage("String_Node_Str");
  }
 else {
    Calendar cal=Calendar.getInstance();
    cal.set(fromDate.getYear(),fromDate.getMonth(),fromDate.getDay());
    double from=cal.getTimeInMillis() / 1000;
    cal.set(toDate.getYear(),toDate.getMonth(),toDate.getDay());
    double to=cal.getTimeInMillis() / 1000;
    if (searchText1.getText().equals("String_Node_Str") && selectPresidentSearch.getSelectionIndex() == 0 && selectDocumentSearch.getSelectionIndex() == 0) {
      form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
      return false;
    }
 else     if (from > to) {
      form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
      return false;
    }
    form.getMessageManager().removeMessage("String_Node_Str");
  }
  String corpusName=corpusNameTxt.getText();
  if (null == corpusName || corpusName.isEmpty()) {
    form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
    return false;
  }
 else {
    String outputDir=IAmericanPresidencyCrawlerViewConstants.DEFAULT_CORPUS_LOCATION + File.separator + corpusName;
    if (new File(outputDir).exists()) {
      form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
      return false;
    }
 else {
      form.getMessageManager().removeMessage("String_Node_Str");
      return true;
    }
  }
}

Fixed version (ground truth):
private boolean canItProceed(){
  form.getMessageManager().removeAllMessages();
  if (dateCheckBrowse.getSelection()) {
    if (browseDay.getSelectionIndex() == 0 && browseMonth.getSelectionIndex() == 0 && browseYear.getSelectionIndex() == 0) {
      form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
      return false;
    }
 else     form.getMessageManager().removeMessage("String_Node_Str");
  }
  if (dateCheckSearch.getSelection()) {
    Calendar cal=Calendar.getInstance();
    cal.set(fromDate.getYear(),fromDate.getMonth(),fromDate.getDay());
    double from=cal.getTimeInMillis() / 1000;
    cal.set(toDate.getYear(),toDate.getMonth(),toDate.getDay());
    double to=cal.getTimeInMillis() / 1000;
    if (from > to) {
      form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
      return false;
    }
    form.getMessageManager().removeMessage("String_Node_Str");
  }
  if (searchText1.getText().equals("String_Node_Str") && selectPresidentSearch.getSelectionIndex() == 0 && selectDocumentSearch.getSelectionIndex() == 0) {
    form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
    return false;
  }
 else {
    form.getMessageManager().removeMessage("String_Node_Str");
  }
  String corpusName=corpusNameTxt.getText();
  if (null == corpusName || corpusName.isEmpty()) {
    form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
    return false;
  }
 else {
    String outputDir=IAmericanPresidencyCrawlerViewConstants.DEFAULT_CORPUS_LOCATION + File.separator + corpusName;
    if (new File(outputDir).exists()) {
      form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
      return false;
    }
 else {
      form.getMessageManager().removeMessage("String_Node_Str");
      return true;
    }
  }
}