computation produces IEEE Denormal

    Facility: DEBUG, VMS Debugger

    Explanation: The expression evaluated by the debugger results in
    an IEEE Denormal value being produced. IEEE Denormal values are
    values between zero and the smallest normalized value.

    User Action: In general, this is acceptable. If, however, you are
    debugging high-performance code and have just deposited an IEEE
    Denormal value, then you must correct the value before resuming
    your program, or the program will fail. Replace the IEEE Denormal
    value with a zero.