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

 Message        #ifndef argument is not an identifier.

 Description    An #ifndef preprocessing directive was not followed
                by an identifier.  The compiler will consider this to
                be a TRUE condition.

 User Action    Supply a valid identifier to the directive.