access violation in address computation for address_value

    Facility: DEBUG, VMS Debugger

    Explanation: The address computation for the specified variable
    resulted in an access violation. This normally means that a
    register value or a descriptor needed in the address computation
    is uninitialized or corrupted.

    User Action: If the necessary register or descriptor is not yet
    initialized, the variable is not available at this point in the
    code. If the register or descriptor is corrupted, the cause of
    this error should be located and corrected.