When using the Hypermesh CFD software to simulate the official website's "Supersonic Flow in a Converging-Diverging Nozzle" case, after setting the periodic boundary, an "error occurred executing acuPrep" situation occurred during the acuSolver operation. This is the error vlog. The problem lies in the set periodic boundary, indicating that acuPrep could not be enabled. Specifically, the nodes were undefined.
