Hi All, I am trying using Nektar for solving the compressible flow over a cavity at Re - 10^7 per meter. I tried to set the parameters as per the user guide but the solution terminates saying "NaN error found during time integration". Initially, I used structured grid with fine mesh near the walls, but it didn't work. And when I use a coarse structured grid it runs for a while and then terminates saying the same issue. When I tried with a lesser Reynolds no. (0.3x10^7) and a coarse unstructured grid, I worked but had a very bad residual. The tutorials provided by Nektar are all cases of incompressible flow, which works fine. I can't find any examples of using compressible flow solver in the tutorials. Can anyone please give me an example of how to set the parameters and solver info for using compressible flow solver. And what changes in the parameters and solverinfo should be done to solve steady cases of compressible flow in Nektar. Thanking you. Regards, Dev