Re: [deal.II] Re: Doubt Related to DataPostprocessor class

[Luca Heltai]

You should also change the extension of the file to “.vtu”. (When you define the file name in the program). You changed “write_vtk” to “write_vtu” but you kept the extension of the vtk format. Paraview thinks it is a vtk format, and does not recognize it.  Luca Il giorno 24 nov 2022, alle ore 05:23, Deepika Kushwah <deepika20263...@iitgoa.ac.in> ha scritto:  Thank you for your reply.  Yes it is working. But now the problem is how to visualize these files in paraview? it showing the following error:         [ 66%] Linking CXX executable step-8 [ 66%] Built target step-8 [100%] Run step-8 with Debug configuration Cycle 0:    Number of active cells:       256    Number of degrees of freedom: 578 Cycle 1:    Number of active cells:       484    Number of degrees of freedom: 1082 Cycle 2:    Number of active cells:       922    Number of degrees of freedom: 2030 Cycle 3:    Number of active cells:       1750    Number of degrees of freedom: 3774 Cycle 4:    Number of active cells:       3319    Number of degrees of freedom: 7064 Cycle 5:    Number of active cells:       6301    Number of degrees of freedom: 13124 Cycle 6:    Number of active cells:       11935    Number of degrees of freedom: 24838 Cycle 7:    Number of active cells:       22543    Number of degrees of freedom: 46256 [100%] Built target run deepika@deepika-virtual-machine:~/dealii/examples/step-8$ paraview Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway. Mesa warning: Window 20971529 has no colormap! Mesa warning: Window 20971532 has no colormap! Mesa warning: Window 20971542 has no colormap! ERROR: In /home/ubuntu/OpenFOAM/ThirdParty-dev/ParaView-5.6.3/VTK/IO/XMLParser/vtkXMLParser.cxx, line 391 vtkXMLDataParser (0x5640c1c302a0): Error parsing XML in stream at line 37, column 0, byte index 20093: junk after document element ERROR: In /home/ubuntu/OpenFOAM/ThirdParty-dev/ParaView-5.6.3/VTK/IO/XML/vtkXMLReader.cxx, line 488 vtkXMLUnstructuredGridReader (0x5640c1c7b1a0): Error parsing input file.  ReadXMLInformation aborting. Also it is asking the reader to open the vtk & vtu files.  <image.png> On Wed, Nov 23, 2022 at 11:08 PM Abbas <abbas.ballou...@gmail.com> wrote: Change "data_out.write_vtk (output);" to "data_out.write_vtu (output);"  https://groups.google.com/g/dealii/c/T1ckYL0Le_U/m/54r575TiAwAJ On Wednesday, November 23, 2022 at 11:16:42 AM UTC+2 deepika...@iitgoa.ac.in wrote: Hello Everyone, I am trying to calculate the gradient of displacement for step 8, for that, I am using the Datapostprocessor Tensor class (same example code which is given in the documentation here - https://www.dealii.org/current/doxygen/deal.II/classDataPostprocessorTensor.html) but I am getting the following error:  66%] Linking CXX executable step-8 [ 66%] Built target step-8 [100%] Run step-8 with Debug configuration Cycle 0:    Number of active cells:       256    Number of degrees of freedom: 578 ---------------------------------------------------- Exception on processing: -------------------------------------------------------- An error occurred in line <5286> of file <./source/base/data_out_base.cc> in function     void dealii::DataOutBase::write_vtk(const std::vector<dealii::DataOutBase::Patch<dim, spacedim> >&, const std::vector<std::__cxx11::basic_string<char> >&, const std::vector<std::tuple<unsigned int, unsigned int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, dealii::DataComponentInterpretation::DataComponentInterpretation> >&, const dealii::DataOutBase::VtkFlags&, std::ostream&) [with int dim = 2; int spacedim = 2; std::ostream = std::basic_ostream<char>] The violated condition was:     std::get<3>(nonscalar_data_range) != DataComponentInterpretation::component_is_part_of_tensor Additional information:     You are trying to use functionality in deal.II that is currently not     implemented. In many cases, this indicates that there simply didn't     appear much of a need for it, or that the author of the original code     did not have the time to implement a particular case. If you hit this     exception, it is therefore worth the time to look into the code to     find out whether you may be able to implement the missing     functionality. If you do, please consider providing a patch to the     deal.II development sources (see the deal.II website on how to     contribute). -------------------------------------------------------- Aborting! ---------------------------------------------------- make[3]: *** [CMakeFiles/run.dir/build.make:71: CMakeFiles/run] Error 1 make[2]: *** [CMakeFiles/Makefile2:116: CMakeFiles/run.dir/all] Error 2 make[1]: *** [CMakeFiles/Makefile2:123: CMakeFiles/run.dir/rule] Error 2 make: *** [Makefile:137: run] Error 2 How to resolve this?  Thanks & Regards, Deepika ************************************************************************** This e-mail is for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies and the original message. 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