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

 Message        <Context> "<expression>" has <type> type, but occurs
                in a context that requires a union or struct.

 Description    The left operand of the .  or -> operator does not
                have struct or union type.

 User Action    Correct the operand.