Dear all, I know it is more a paraview question than firedrake, but the question is about how to visualize the data using paraview. The documentation on the firedrake website is quite succinct and does not tell anything about the User Interface of Paraview, which is fine. But I do not know how to get pictures and I wonder where the error lies. If I run some example, like say, Camassa-Holm I obtain a sequence of .vtu files. When opening with paraview 5.8.1 the files u.pvd or u_0.pvd I obtain the image in attachment. The image points out to several errors: "Number of cells: 0" "Number of points: 0" "X range: not available" "Y range: not available" "Z range: not available" So clearly some grid is missing somewhere but I do not know how to provide it. Would it be possible to provide some basic information on how to use paraview on the vtu files? Alternatively, since Paraview is scriptable, I would very much appreciate having a python script for creating output from paraview (such as the double-slit youtube video) in one of the tutorial test cases. Thank you very much in advance for any help, Mathieu
