Ordinarily, you must provide an element name, even if you are providing a label, and the name must satisfy certain criteria, such as not containing spaces or special characters.
If you would like to deal exclusively with labels, you can select . In this work mode, you only have to provide a label for elements. The product automatically converts the label to a legal element name, replacing any characters that cannot be used in element names. The text that you entered as the label is shown in the browser, graphic editor, and the Features window.