So far as I can tell, all you're doing is nesting multiple levels of invalid fields.
The { Name } field on its own returns "Error! Bookmark not defined."
The { Title } field on its own returns "Error! Bookmark not defined."
The { Addin } field on its own returns "Error! Bookmark not defined."
The {Title { Name } } field pair likewise returns "Error! Bookmark not defined."
The { Addin {Title { Name } } } field set likewise returns "Error! Bookmark not defined."
Why? Because Word has no such fields as Name or Title. If your installation supports either of these, it's because you have some kind of Word Addin installed.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]