Hi dsurendr,

But in HFSS v15, Ansys allowed Direct Solver with FE-BI hybrid boundary. Is there a specific reason that this feature was discontinued?

The reason I am asking this is because I have a large model. And the domain decomposition solver is failing to converge after 200 iterations. I was recommended to use Direct Solver here. But I want to use FE-BI boundary because Radiation boundary is giving some reflections. If I use PML over the full model, the problem gets extremely large and not feasible to solve. Is it possible to bring back FEBI with direct solver (just like HFSS v15)?