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

 Message        Const variable resides in wrt extern model.

 Description    The current extern model places all external objects
                in a modifiable section.  Placing an object with a
                const type qualifier in such a section means that
                there is no run-time protection against writing to
                the object.  This might not have been what you
                intended.

 User Action    Place const objects in sections that cannot be
                modified.