The game just randomly backed out whilst driving a HST, what do you think happened please, many thanks.
That's the code for Integer divide by zero, and can can be caused by any number of things - the usual suspect is a Workshop scenario. But in TS20XX it can also be caused by a corrupt scenario or from an outdated driver, sound, graphics, etc. Difficult to fix. Are you running in 32-bit or 64-bit?
It could be that the Scenario/HST was coded in 32-bit, and in 64-bit and the crash occurs due the use of different RAM addresses. Does this happen in 32-bit too? I have to admit that this is just conjecture on my part, but this is not an easy error to fix as it may only happen in certain circumstances.