Hello Rob, I have made a copy of the simuation with the only change being the steady state. It failed within a minute or two with exactly the same errors. I realised that I had set the inlet gauge pressure, but not the outlet. I believe that may cause some issues with the simulation, as when I set the pressure to the same as the inlet, it started calculating!
Could you let me know if this could have been the cause of the problem with this simulation?
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