MeshTaichi Fails when reading .mesh file generated by meshio

[qmdxcube]

This is my code. The program read an .inp file generated by Abaqus, and then transform the mesh into .mesh format. But when load the mesh by Patcher, it failed.

`
import taichi as ti
import meshtaichi_patcher as Patcher
import meshio

ti.init(arch=ti.cpu,kernel_profiler=True)

if name == 'main':
mesh = meshio.read("Job-1.inp")
mesh.write("LBeam.mesh")
# print(mesh.points)
# print(mesh.cells)
# print(mesh.cells_dict)
mesh = meshio.read("LBeam.mesh")
mesh = Patcher.load_mesh("LBeam.mesh", relations=["CV"])
`

Here is the error