getfem_tvtk not working

[Lorenzo Ferro]

Dear All,

I've installed GetFEM (getfem5.3win-amd64-py3.7.exe) on Windows 10 with Anaconda 3 (mandatory generating a Python <= 3.7 environment) and Mayavi 4.7.1 via Conda repository.

When I run the demo_tripod.py the simulation runs correctly and I can see the results via Mayavi or GMSH but unfortunately I cannot see the getfem_tvtk output since I get the following messages:

---quote---

You can view the tripod with (for example) mayavi:

mayavi2 -d tripod.vtk -f WarpVector -m Surface

or

gmsh tripod.pos

Traceback (most recent call last):

  File ".\demo_tripod.py", line 146, in <module>

    fig.show(mfu, deformation=U, data="" deformation_scale='20%')

  File "C:\Users\Ferro\anaconda3\pkgs\getfem-5.4.1\interface\tests\python\getfem_tvtk.py", line 452, in show

    self.show_mesh_fem(mf, **args)

  File "C:\Users\Ferro\anaconda3\pkgs\getfem-5.4.1\interface\tests\python\getfem_tvtk.py", line 410, in show_mesh_fem

    self.actors += it.vtk_actors()

  File "C:\Users\Ferro\anaconda3\pkgs\getfem-5.4.1\interface\tests\python\getfem_tvtk.py", line 299, in vtk_actors

    self.mapper = tvtk.PolyDataMapper(input=data);

  File "C:\Users\Ferro\anaconda3\envs\Python37\lib\site-packages\tvtk\tvtk_classes.zip\tvtk_classes\poly_data_mapper.py", line 45, in __init__

  File "C:\Users\Ferro\anaconda3\envs\Python37\lib\site-packages\tvtk\tvtk_base.py", line 362, in __init__

    super(TVTKBase, self).__init__(**traits)

  File "C:\Users\Ferro\anaconda3\envs\Python37\lib\site-packages\traits\trait_type.py", line 67, in _read_only

    % (name, class_of(object))

traits.trait_errors.TraitError: The 'input' trait of a PolyDataMapper instance is 'read only'.

---unquote---

I'd like very much to use the internal visualizer and to produce direct outputs after the simulations.

Can anyone tell me what's going wrong?

Thank you in advance.

Lorenzo