{"UUID":"dfca998b-0d9b-4f99-b03b-6a6d72175421","URL":"https://en.wikipedia.org/wiki/Cluster_%28spacecraft%29?oldid=217305667","StartTime":"0001-01-01T00:00:00Z","EndTime":"0001-01-01T00:00:00Z","Categories":["postmortem"],"Company":"European Space Agency","Product":"","Description":"An overflow occurred when converting a 16-bit number to a 64-bit numer in the Ariane 5 intertial guidance system, causing the rocket to crash. The actual overflow occurred in code that wasn't necessary for operation but was running anyway. According to [one account](https://web.archive.org/web/20120829114850/https://www.around.com/ariane.html), this caused a diagnostic error message to get printed out, and the diagnostic error message was somehow interpreted as actual valid data. According to [another account](https://en.wikipedia.org/wiki/Cluster_%28spacecraft%29?oldid=217305667), no trap handler was installed for the overflow."}