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

 Message        <Context> "<name>" has a duplicate typedef at
                <where>.  This might not be portable.

 Description    The same typedef has been declared to the same type
                more than once.  Standard C does not allow this and
                other compilers might not accept it.

 User Action    Remove the redundant declaration.