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

 Message        <Context> the address constant "<expression>" can be
                cast only to a pointer type, but "<type>" is <type
                class> type.

 Description    An address constant can only be cast to a pointer
                type.

 User Action    Correct the cast.