Error when viewing XDMF in Paraview

[dokken]

Could you add the content of out.xdmf here? And try doing the same as suggested in

Cannot open .xdmf files in legacy version of fenics + latest Paraview

Please post the contents of the XDMFFile? Additionally, could you use ascii encoding and add the output of your xdmf file, i.e. encoding = XDMFFile.Encoding.ASCII file = XDMFFile("poissonFile.xdmf") file.write(u,encoding=encoding)