Hello computer
First english is my third language, so be fine with me.
On the first fly of the Ariane V they use the software (ADA software) of the old rocket with the parameters of Ariane IV. Since Ariane V capability are upper Ariane IV, this software understand that the rocket was out of direction/line. But it wasn't. So the the computer raise an exception that will send an order to self-destruction. Please to see you !