Thank you Jeff, but when I load your updated .mfx and .stl, the “index, dimension 1, above upper bounds” type error happened again, and I did not change your settings and the .stl file. So I wonder whether there exists some stochastic effects to incur error in one computer while run meshing normally in another computer? Thank you.
And when I just copied and pasted your clean .mfx and .stl files into a new project and open the project by clicking its .mfx file, the error reported in the following link happened. I remembered this kind of problem happened just after I deleted the mfix21.2 and installed 21.3 version. And there is no bug report generated currently. Thank you.