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

 Message        <Context> "<source type>" is <type> type, which is
                not scalar.

 Description    In a cast expression, the destination type of the
                cast is not a scalar type.  This is not valid.  Both
                the source and target type of a cast must be scalars.

 User Action    Modify the cast destination type so that it is a
                scalar type.