VMS Help CC, Messages, IGNORETAG  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> the tag "<name>" is redeclared, but will be
                ignored.

 Description    The "struct" or "union" before the tag used in this
                declaration does not match that in the declaration of
                the tag.  The "struct" or "union" at the earlier
                declaration of the tag will be used in this
                declaration.

 User Action    Either change the current declaration to match the
                declaration of the tag, or create a new tag
                containing the different type.