-domin "file" code can't make the model include slope?

[SUDO0731]

I want to make the model include slope.
But it occurred error.
This is error message and using command.
neper -T -n 86 -domain "file(sinobj.obj)" -o sin
======================== N e p e r =======================
Info : A software package for polycrystal generation and meshing.
Info : Version 4.10.2-2
Info : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)
Info : Running on 24 threads.
Info : https://neper.info
Info : Copyright (C) 2003-2024, and GNU GPL'd, by Romain Quey.
Info : No initialization file found (/home/sudou//.neperrc'). Info : --------------------------------------------------------------- Info : MODULE -T loaded with arguments: Info : [ini file] (none) Info : [com line] -n 86 -domain file(sinobj.obj) -o sin] Info : --------------------------------------------------------------- Info : Reading input data... Info : Creating domain... Info : [i] Parsing file sinobj.obj'...
Info : > Parsing file... 100%
Info : > Recovering edges... 100%
Info : > Recovering face geometry... 100%
Info : [i] Parsed file `sinobj.obj'.
Info : Creating tessellation...
ver = 4 verfaceqty = 2 != 3

Slope is not supported or my fault?
Anyone plz help me.

This is the model I want to make.
\u4e2d\u6b62 (\u30b3\u30a2\u30c0\u30f3\u30d7)

This is obj file that I organized.
sin.txt