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

 Message        <Context> "<expression>" has more precision than
                "<target type>".  Assignment might result in loss of
                precision and/or range.

 Description    The destination of a floating-point assignment has
                less range and/or precision than the expression being
                assigned to the destination.  Because of this, the
                assignment might cause a loss of range and/or
                precision.

 User Action    Verify that no unexpected data can be lost by the
                assignment.  If not, cast the expression to the type
                of the destination.