/sys$common/syshlp/helplib.hlb CC, Messages, REDEFUNION  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> the union "<name>" is redefined.

 Description    The union tag declared in this declaration is already
                declared as a union tag by another declaration.

 User Action    Change the name of the union tag.