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

 Message        <Context> there is a redundant use of type qualifier
                "<const or volatile>".

 Description    The same type qualifier appears more than once in a
                type specifier.  This violates the C89 standard.
                Other compilers may not accept this program.  Note
                that C99 will allow redundant qualifiers.

 User Action    Remove the redundant type qualifier.