Identical errors encountered in re-simulation of previously completed cases: Fortran runtime error: Non-existing record number

I encountered a very strange issue: tutorial cases that I had previously completed following the user manual are now all producing the same error (as shown in the figure). I am currently attempting to conduct some research by inputting only a single particle in the particle_input.csv file, but all previously well-established cases are throwing this error without exception. Could anyone offer some assistance? Many thanks! I uploaded 2 cases, Pre contained the csv file with only one particle, and Attempt was not modified in any way, yet a similar error still occurred

pre4_2026-06-29T181035.089694.zip (20.3 MB)

attempt3_2026-06-29T181310.137714.zip (9.0 MB)

Can you please delete the mesh file and try again? Maybe the mesh file got corrupted.

Thank you, Sir! That’s the problem and solved!