Converting Abaqus model

[m-bellv]

I am trying to load a rat head model (.inp abaqus file) using meshio to convert to a gmsh22 file, but when I load the model it seems some of the information is not being loaded by meshio. The .inp file contains element sets, which may be the source of the issue (#493):

*Node
*Element, type=C3D4
*Elset, elset=BRAIN, generate
*Elset, elset=CSF, generate
*Elset, elset=SKULL, generate
*Elset, elset=WHITE_MATTER, generate
*Elset, elset=WHOLE_HEAD, generate
** Section: Section-1-WHOLE_HEAD
*Solid Section, elset=WHOLE_HEAD, controls=EC-1, material=WHOLE_HEAD
** Section: Section-2-BRAIN
*Solid Section, elset=BRAIN, controls=EC-2, material=BRAIN
** Section: Section-3-SKULL
*Solid Section, elset=SKULL, controls=EC-2, material=SKULL
** Section: Section-4-WHITE_MATTER
*Solid Section, elset=WHITE_MATTER, controls=EC-2, material=WHITE_MATTER
** Section: Section-5-CSF
*Solid Section, elset=CSF, controls=EC-3, material=CSF
** MATERIALS
**
*Material, name=BRAIN
*Material, name=CSF
*Material, name=SKULL
*Material, name=WHITE_MATTER
*Material, name=WHOLE_HEAD

When trying to save to gmsh22 format, using
mesh.write('/home/mbellvila/Downloads/ratmodeloxford/rathead_gmsh22.msh', file_format="gmsh22")
I get the error:
"Warning: Appending zeros to replace the missing physical tag data.
Warning: Appending zeros to replace the missing geometrical tag data."

The meshio file does seem to load some of the information correctly, as the mesh object contains:
Number of points: 597752
Number of cells:
tetra: 3408851
Cell sets: BRAIN, CSF, SKULL, WHITE_MATTER, WHOLE_HEAD

[m-bellv]

The mesh.cell_sets_dict is showing up, making me think the cell sets are loading in correctly:

mesh.cell_sets_dict
Out[104]:
{'BRAIN': {'tetra': array([2654446, 2654447, 2654448, ..., 2889107, 2889108, 2889109],
dtype=int32)},
'CSF': {'tetra': array([3317305, 3317306, 3317307, ..., 3408848, 3408849, 3408850],
dtype=int32)},
'SKULL': {'tetra': array([2889110, 2889111, 2889112, ..., 3233049, 3233050, 3233051],
dtype=int32)},
'WHITE_MATTER': {'tetra': array([3233052, 3233053, 3233054, ..., 3317302, 3317303, 3317304],
dtype=int32)},
'WHOLE_HEAD': {'tetra': array([ 0, 1, 2, ..., 2654443, 2654444, 2654445],
dtype=int32)}}

However, the mesh.point_sets is empty, as is mesh.cell_data, and mesh.point_data, though mesh.points does contain the point location information, and mesh.cells_dict contains the point information for each cell.