I am simulating an object travelling at very high mach - about 7.6 km/s. I have the "high mach number" option checked.

When I press 'Solve', it gives me a warning about high mach for the first few iterations, and then the solver quits at iteration 25.

I did the same simulation, with nothing changed but the speed (to .6 km/s), and the simulation worked flawlessly.

Would anyone know why that is?