Library /sys$common/syshlp/dbg$help.hlb DEBUG, Messages, INTOVF  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 integer overflow at or near opcode_name

    Facility: DEBUG, VMS Debugger

    Explanation: The value being deposited does not fit into the
    specified address.

    User Action: Specify either a smaller value or a different target
    address.