Butterfly in Rhino: simulation stops mid-run and model vanishes

Hi everyone,

I’m currently working on a CFD simulation using Butterfly in Rhino/Grasshopper, and I’m running into a consistent issue.

Whenever I run the simulation (even with around 1000 iterations), it stops abruptly at around iteration 13. After that, my Rhino model disappears completely. I also tried reducing the iteration count to 100, but the same issue still occurs at the same point.

Has anyone experienced something similar or knows what could be causing this?

Any guidance on how to fix this would be really helpful.

Thanks in advance!