VMS Help CC, Messages, TRUNCINTASN  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> "<expression>" has a larger data size than
                "<target type>".  Assignment might result in data
                loss.

 Description    The destination of an integer or pointer assignment
                is smaller than the expression being assigned to the
                destination.  Because of this, the assignment might
                cause data to be lost.

 User Action    Verify that no unexpected data can be lost by the
                assignment.