VMS Help CC, Messages, NESTEDCOMMENT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        Opening comment delimiter found inside a delimited
                comment; a previous comment may be missing its
                closing delimiter.

 Description    C comments delimited by /* */ do not nest.  When /*
                is encountered inside a delimited comment it usually
                means that the previous comment is missing its
                terminating */ or that the user has ill-advisedly
                attempted to "comment out" a section of code that
                contains a delimited comment.

 User Action    It is traditional in C to use #if 0 to conditionalize
                out large sections of code.  You may also want to
                consider //-style comments if the compiler modes you
                care about recognize them.