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

 Message        Possible directive "#<directive>" within a macro
                argument list.  The directive is treated as part of
                the argument list, and not as a preprocessing
                directive.

 Description    The compiler has encountered a directive as part of
                the argument list of a macro invocation.  This
                directive will be treated as part of the argument
                list, and not as a preprocessing directive.  The
                behavior might be different than other compilers.

 User Action    Rewrite the macro invocation so that it does not
                include the directive.