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

 Message        A newline occurs inside of a header name.

 Description    An end of line was encountered before the closing
                double quote or angle bracket of an #include
                directive.

 User Action    Terminate the directive argument properly.