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

 Message        # not in column 1 is ignored, skipping to end of
                line.

 Description    In K & R mode, white space is not allowed before a
                preprocessing directive.  The compiler will ignore
                this source line.

 User Action    Either remove the white space or compile in a mode
                other than K & R.