Style has no mapping
For each style in your Word document, Help Producer needs to have information on how the style should look in the help file. By default, Help Producer creates a wildcard mapping that causes the style attributes to be inherited from the styles in the Word document.
If the help project does not contain a wildcard mapping, you will need to map each document style explicitly. If Help Producer encounters a style that does not have a wildcard mapping nor an explicit mapping, the warning message ‘Style has no mapping’ is displayed.
For details on mapping document styles, see the topic Style Mappings.