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

 Message        <Context> casting of the constant "<constant>" to
                <type> type will cause data loss.

 Description    A constant is cast to a type that is too small to
                hold the constant value.  Data will be lost in the
                conversion.

 User Action    Remove the cast, or use a smaller constant.