The error message seems to be genuine. As far as I know jaxws use document/literal-wrapped style by default so you should expect a jaxws type generated for the methods in your interface. I'm new to jaxws but found netbeans en excellent tool to also learn jaxws. For example after following a netbeans jaxws tutorial you can switch to 'Files' view and can see all the generated files easily that help quite a lot to understand what you are doing.
HTH
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