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

 Message        <Context> integer overflow occurs in evaluating the
                expression "<expression>".

 Description    An integer overflow occurred while evaluating a
                constant expression.  The value of the expression is
                undefined.

 User Action    Correct the constant expression so that it does not
                overflow.