Can't set cell_data scalars in UnstructuredGrid

[James-Woodford]

Hello,

I have some code that I use to write an UnstructuredGrid mesh to vtk. I have been using Python 3.10, mayavi 4.8.2, and vtk 9.3.0 for some time without issues. I recently upgraded the mayavi version to 4.8.3 and vtk to 9.5.0 and get the following error after the code below

        unstructured_grid = tvtk.UnstructuredGrid(points=points)
        unstructured_grid.set_cells(cell_types, offset, cell_array)
       
        unstructured_grid.cell_data.sclars = cell_data  # <-- error occurs at this line when trying to access UnstructuredGrid.cell_data
        unstructured_grid.cell_data.sclars.name = 'MaterialID'

        writer = tvtk.UnstructuredGridWriter(file_name=self.filename)
        writer.set_input_data(unstructured_grid)
        writer.update()
        writer.write()

traits.trait_errors.TraitError: Cannot set the undefined 'copy_global_ids' attribute of a 'CellData' object.

Any help would be awesome! I tried installing mayavi from the master brance (I think the version is 4.8.4dev0) and the issue sticks around. I also get the same error if I try python 3.12

[drocheam]

There haven't been any fixes for running it with vtk 9.5 yet.
Until then, you can try using an older version such as 9.4.2.
You can force the installation by running the commands in #1350 (comment)