# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?no_subcategories=false&page=113

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**Page:** 114

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## [XDMF in parallel: Failed to read attribute data](https://discourse.paraview.org/t/xdmf-in-parallel-failed-to-read-attribute-data/9223)

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**Author:** [@EdoAlvarezR](https://discourse.paraview.org/u/EdoAlvarezR)\
**Replies:** 0\
**Last updated:** [March 18, 2022, 6:38pm UTC](https://discourse.paraview.org/t/xdmf-in-parallel-failed-to-read-attribute-data/9223 "2022-03-18T18:38:35Z")

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I’m having issues reading an XDMF structured grid in parallel. This issues seems similar to LINK1 and LINK2. Here I’m uploading the .xmf header and .h5 dataset. singlerotorfdom.396.h5 (3.6 MB) singlerotorfdom.396.xmf (…

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## [Loading OpenFOAM decomposed Case takes more than 8 hours](https://discourse.paraview.org/t/loading-openfoam-decomposed-case-takes-more-than-8-hours/6302)

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**Author:** [@ANON1](https://discourse.paraview.org/u/ANON1)\
**Replies:** 11\
**Last updated:** [March 18, 2022, 4:40pm UTC](https://discourse.paraview.org/t/loading-openfoam-decomposed-case-takes-more-than-8-hours/6302 "2022-03-18T16:40:37Z")

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Hello, I have a very large decomposed OpenFOAM case with (72 processors folders). The size of the case is more than 200GB. I used to use the reconstructPar utility of OpenFOAM to construct only a few timesteps that I ca…

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## [pvpython scripting in parallel](https://discourse.paraview.org/t/pvpython-scripting-in-parallel/9210)

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**Author:** [@Ying](https://discourse.paraview.org/u/Ying)\
**Replies:** 1\
**Last updated:** [March 18, 2022, 4:31pm UTC](https://discourse.paraview.org/t/pvpython-scripting-in-parallel/9210 "2022-03-18T16:31:46Z")

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Hi, I use pvpython scripting to convert a bunch of vtk files to png images in paraview. The logic is to: (i) define main function vtkToImg(), which reads one vtk file and save it as one screenshot (.png); (ii) use for…

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## [Distribution of data for vtu format files](https://discourse.paraview.org/t/distribution-of-data-for-vtu-format-files/9199)

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**Author:** [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)\
**Replies:** 1\
**Last updated:** [March 18, 2022, 4:09pm UTC](https://discourse.paraview.org/t/distribution-of-data-for-vtu-format-files/9199 "2022-03-18T16:09:56Z")

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Hello, I use Paraview 5.10 and openMPI 4.0.3. I want to distribute data in vtu format across MPI processes. I can’t seem to work out how it is supposed to distribute the data. Here is an example to show you my problem: …

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## [How to use python 3 with pvpython](https://discourse.paraview.org/t/how-to-use-python-3-with-pvpython/9215)

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**Author:** [@Ying](https://discourse.paraview.org/u/Ying)\
**Replies:** 4\
**Last updated:** [March 18, 2022, 3:21pm UTC](https://discourse.paraview.org/t/how-to-use-python-3-with-pvpython/9215 "2022-03-18T15:21:27Z")

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Hi all, pvpython is a python interface to paraview, is it possible to change the python version when using pvpython, like from python 2 to python 3? I use Ubuntu 18.04 + Paraview 5.0.1. Thanks!

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## [save selected surfaces from ExtractSurface](https://discourse.paraview.org/t/save-selected-surfaces-from-extractsurface/9213)

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**Author:** [@S\_Otta](https://discourse.paraview.org/u/S_Otta)\
**Replies:** 3\
**Last updated:** [March 18, 2022, 12:51pm UTC](https://discourse.paraview.org/t/save-selected-surfaces-from-extractsurface/9213 "2022-03-18T12:51:32Z")

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I have an Ensight case file which has several domains. After loading the complete file, I used the extract surface filter and then identified a subset of the all the surfaces to save to an STL file. Currently save data s…

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## [Paraview not loading files other than native to VTK/Paraview](https://discourse.paraview.org/t/paraview-not-loading-files-other-than-native-to-vtk-paraview/9207)

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**Author:** [@S\_Otta](https://discourse.paraview.org/u/S_Otta)\
**Replies:** 6\
**Last updated:** [March 17, 2022, 10:07pm UTC](https://discourse.paraview.org/t/paraview-not-loading-files-other-than-native-to-vtk-paraview/9207 "2022-03-17T22:07:41Z")

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Paraview (different versions, have tried 5.4 onwards) not loading files other than those native to VTK/Paraview like .vtu .vtp. I am trying to load an Ensight case with all associated files like a CGNS files and other s…

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## [Version 5.9.1 QCriterion](https://discourse.paraview.org/t/version-5-9-1-qcriterion/9205)

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**Author:** [@anthonyegelnjr](https://discourse.paraview.org/u/anthonyegelnjr)\
**Replies:** 2\
**Last updated:** [March 17, 2022, 1:27pm UTC](https://discourse.paraview.org/t/version-5-9-1-qcriterion/9205 "2022-03-17T13:27:00Z")

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I have used various versions of ParaView in the past and taken advantage of the “Compute QCriterion” option under the GradientOfUnstructuredDataSet filter. I have recently been working with data sets on a remote server w…

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## [Probe](https://discourse.paraview.org/t/probe/9194)

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**Author:** [@PALANI](https://discourse.paraview.org/u/PALANI)\
**Replies:** 9\
**Last updated:** [March 17, 2022, 11:59am UTC](https://discourse.paraview.org/t/probe/9194 "2022-03-17T11:59:01Z")

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I used probe at the first timestep of my data, in spreadsheet view, I didn’t get any values or parameters, but when I used a different time step, the Values with the parametrs are visible. Why is this happening and how d…

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## [Visualizing sliced scalar field in moving frame of reference](https://discourse.paraview.org/t/visualizing-sliced-scalar-field-in-moving-frame-of-reference/9176)

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**Author:** [@Jeremie](https://discourse.paraview.org/u/Jeremie)\
**Replies:** 18\
**Last updated:** [March 17, 2022, 11:11am UTC](https://discourse.paraview.org/t/visualizing-sliced-scalar-field-in-moving-frame-of-reference/9176 "2022-03-17T11:11:30Z")

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Hi everyone, I am tackling a rather thorny visualization issue. I have an object moving in a 3D box with periodic boundary conditions and I want to visualize fields around that object as it reaches its steady state (co…

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## [Error when exporting vtkjs with paraviewGlance html](https://discourse.paraview.org/t/error-when-exporting-vtkjs-with-paraviewglance-html/4309)

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**Author:** [@af11g11](https://discourse.paraview.org/u/af11g11)\
**Replies:** 17\
**Last updated:** [March 16, 2022, 11:32pm UTC](https://discourse.paraview.org/t/error-when-exporting-vtkjs-with-paraviewglance-html/4309 "2022-03-16T23:32:45Z")

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Hi, When exporting a scene from ParaView for use with ParaView Glance I seem to be running into trouble. My workflow is: exportScene \> “name”.vtkjs \> click cog and select paraviewGlance HTML (save textures had both on &…

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## [Paraview's 2DC Cylindrical Cell Mass totals not equaling CTH's OCTH or closed form totals.](https://discourse.paraview.org/t/paraviews-2dc-cylindrical-cell-mass-totals-not-equaling-cths-octh-or-closed-form-totals/9201)

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**Author:** [@GregC](https://discourse.paraview.org/u/GregC)\
**Replies:** 0\
**Last updated:** [March 16, 2022, 7:19pm UTC](https://discourse.paraview.org/t/paraviews-2dc-cylindrical-cell-mass-totals-not-equaling-cths-octh-or-closed-form-totals/9201 "2022-03-16T19:19:24Z")

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I’ll preface this saying a fairly new user to both CTH and ParaView, so I’m leaning towards this being user error and not any issues with the programs. I have a half a circle set up in CTH using the 2DC cylindrical coor…

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## [paraview python script, doesn't work properly on remote server](https://discourse.paraview.org/t/paraview-python-script-doesnt-work-properly-on-remote-server/9187)

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**Author:** [@gv871](https://discourse.paraview.org/u/gv871)\
**Replies:** 3\
**Last updated:** [March 16, 2022, 5:39pm UTC](https://discourse.paraview.org/t/paraview-python-script-doesnt-work-properly-on-remote-server/9187 "2022-03-16T17:39:26Z")

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Hello, I have the following python script that runs without problem on my local machine. from paraview.simple import GetSources all\_sources = GetSources() for s\_string,s\_id in all\_sources: source = all\_sources\[s\_s…

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## [Compute pressure coefficient on the cylinder surface](https://discourse.paraview.org/t/compute-pressure-coefficient-on-the-cylinder-surface/9185)

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**Author:** [@xq520](https://discourse.paraview.org/u/xq520)\
**Replies:** 7\
**Last updated:** [March 16, 2022, 3:53pm UTC](https://discourse.paraview.org/t/compute-pressure-coefficient-on-the-cylinder-surface/9185 "2022-03-16T15:53:25Z")

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Hello everyone, I want to compute the pressure coefficient on the cylinder wall (the inner cylinder). As can be seen below. The wall contains density, pressure, velocity, I think. Could someone tell me how to get the pr…

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## [Importing Ansys Fluent results to Paraview](https://discourse.paraview.org/t/importing-ansys-fluent-results-to-paraview/4862)

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**Author:** [@Amalesh](https://discourse.paraview.org/u/Amalesh)\
**Replies:** 16\
**Last updated:** [March 16, 2022, 9:12am UTC](https://discourse.paraview.org/t/importing-ansys-fluent-results-to-paraview/4862 "2022-03-16T09:12:05Z")

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I’m new to the paraview application I don’t know how to import the results from my Ansys fluent. I don;t know which file format Paraview will support? Pls some give me suggestion to import the results from Ansys to Parav…

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## [How to add filename as text in the renderview?](https://discourse.paraview.org/t/how-to-add-filename-as-text-in-the-renderview/9179)

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**Author:** [@Ying](https://discourse.paraview.org/u/Ying)\
**Replies:** 6\
**Last updated:** [March 16, 2022, 8:28am UTC](https://discourse.paraview.org/t/how-to-add-filename-as-text-in-the-renderview/9179 "2022-03-16T08:28:14Z")

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Hi, I have a bunch of vtk files named by simulation time: U\_0.05.vtk, U\_0.10.vtk, U\_0.15.vtk, … Now I want to extract the time in filename, i.e, 0.05, 0.10, 0.15, …, and source → text to renderview, like time=0.05, time…

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## [Show text field changing every time step from programmable filter](https://discourse.paraview.org/t/show-text-field-changing-every-time-step-from-programmable-filter/1469)

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**Author:** [@gromaxe](https://discourse.paraview.org/u/gromaxe)\
**Replies:** 7\
**Last updated:** [March 15, 2022, 9:32pm UTC](https://discourse.paraview.org/t/show-text-field-changing-every-time-step-from-programmable-filter/1469 "2022-03-15T21:32:04Z")

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Hello everyone! Now I’m trying to get time in YYYY-MM-DD format for animation via programmable filter ( I still haven’t figured out how to write it to new variable, but i’m working on it). Having a variable same length…

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## [Ray tracing with volume rendering](https://discourse.paraview.org/t/ray-tracing-with-volume-rendering/4498)

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**Author:** [@Gwang-Jin\_Lee](https://discourse.paraview.org/u/Gwang-Jin_Lee)\
**Replies:** 12\
**Last updated:** [March 15, 2022, 2:50pm UTC](https://discourse.paraview.org/t/ray-tracing-with-volume-rendering/4498 "2022-03-15T14:50:43Z")

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Hello. I am trying to render my wavefront obj files with netCDF. And I would like to apply the ray tracing to the obj files. But, when I applied the ray tracing with OptiX, the volume-rendered netCDF data disappeared: …

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## [Macros gets the information of the read file](https://discourse.paraview.org/t/macros-gets-the-information-of-the-read-file/9181)

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**Author:** [@flow\_zhang](https://discourse.paraview.org/u/flow_zhang)\
**Replies:** 0\
**Last updated:** [March 15, 2022, 8:40am UTC](https://discourse.paraview.org/t/macros-gets-the-information-of-the-read-file/9181 "2022-03-15T08:40:44Z")

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I want to use the macros script to do the same processing for all the read in files. How can I get information from the tree of the pipline browser when I’m not sure about the contents of the file As shown in the fig…

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## [Calculating Laplacian of scalar field with a Python Calculator filter results in exactly 0 at every point](https://discourse.paraview.org/t/calculating-laplacian-of-scalar-field-with-a-python-calculator-filter-results-in-exactly-0-at-every-point/9165)

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**Author:** [@Reed\_Brown](https://discourse.paraview.org/u/Reed_Brown)\
**Replies:** 6\
**Last updated:** [March 15, 2022, 8:14am UTC](https://discourse.paraview.org/t/calculating-laplacian-of-scalar-field-with-a-python-calculator-filter-results-in-exactly-0-at-every-point/9165 "2022-03-15T08:14:57Z")

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I have velocity data from a CFD calculation. The data are the values of the x component of velocity (u) and the y component of velocity (v) on a 2D domain. The mesh is non-uniform. I’m trying to calculate the Laplacian …

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## [Calculate Residence time using Paraview](https://discourse.paraview.org/t/calculate-residence-time-using-paraview/9074)

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**Author:** [@oumnion](https://discourse.paraview.org/u/oumnion)\
**Replies:** 15\
**Last updated:** [March 14, 2022, 5:53pm UTC](https://discourse.paraview.org/t/calculate-residence-time-using-paraview/9074 "2022-03-14T17:53:48Z")

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Hello, I am trying to calculate the residence time in a TJunction and I was wondering if I could perform that just by post-processing the results using Paraview (without injecting a tracer through scalarTransportFoam)

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## [Paraview started showing surface roughness, not sure how it happened or what metric is being used](https://discourse.paraview.org/t/paraview-started-showing-surface-roughness-not-sure-how-it-happened-or-what-metric-is-being-used/9175)

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**Author:** [@ZhangxiFeng](https://discourse.paraview.org/u/ZhangxiFeng)\
**Replies:** 19\
**Last updated:** [March 14, 2022, 5:24pm UTC](https://discourse.paraview.org/t/paraview-started-showing-surface-roughness-not-sure-how-it-happened-or-what-metric-is-being-used/9175 "2022-03-14T17:24:34Z")

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This has never happened before in my many years of using Paraview, but suddenly when I launch the program and opened a VTK file, it showed a model with surface roughness. I checked the initial state of the model and Para…

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## [How to use VTK Extension filters standalone?](https://discourse.paraview.org/t/how-to-use-vtk-extension-filters-standalone/9166)

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**Author:** [@Vishnu-C](https://discourse.paraview.org/u/Vishnu-C)\
**Replies:** 1\
**Last updated:** [March 14, 2022, 1:17pm UTC](https://discourse.paraview.org/t/how-to-use-vtk-extension-filters-standalone/9166 "2022-03-14T13:17:28Z")

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Hello all, I am in development of certain functions with help of VTK binaries that I built in VS2019. I would like to use certain filters in VTKExtensions/FiltersGeneral. Is it possible to build only those as a lib? Ple…

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## [How to deploy a custom app based on ParaView?](https://discourse.paraview.org/t/how-to-deploy-a-custom-app-based-on-paraview/9163)

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**Author:** [@Cam](https://discourse.paraview.org/u/Cam)\
**Replies:** 1\
**Last updated:** [March 14, 2022, 7:53am UTC](https://discourse.paraview.org/t/how-to-deploy-a-custom-app-based-on-paraview/9163 "2022-03-14T07:53:46Z")

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I am having some troubles to deploy the application (i.e., need to move all relevant ParaView files to target location). Was there a CMake API to do it?

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## [Numpy package not found in paraview 5.10](https://discourse.paraview.org/t/numpy-package-not-found-in-paraview-5-10/9141)

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**Author:** [@Darz](https://discourse.paraview.org/u/Darz)\
**Replies:** 3\
**Last updated:** [March 14, 2022, 7:40am UTC](https://discourse.paraview.org/t/numpy-package-not-found-in-paraview-5-10/9141 "2022-03-14T07:40:24Z")

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Hello, I get a run time error when I try to use python calculator filter in paraview 5.10 in ubuntu 20.04. Stating that numpy package is not there in python library. Traceback (most recent call last): File “”, line 2,…

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## [\[5.10\] How to disable automatic renaming of numbered variables into tensors](https://discourse.paraview.org/t/5-10-how-to-disable-automatic-renaming-of-numbered-variables-into-tensors/9162)

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**Author:** [@path](https://discourse.paraview.org/u/path)\
**Replies:** 13\
**Last updated:** [March 14, 2022, 7:39am UTC](https://discourse.paraview.org/t/5-10-how-to-disable-automatic-renaming-of-numbered-variables-into-tensors/9162 "2022-03-14T07:39:46Z")

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Is there any way to disable the automatic renaming of numbered variables into tensors (e.g. var1, var2, var3 → var array with X, Y, Z components)? In my field, I work with these types of numbered variables which are stri…

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## [LIGGTHS questions](https://discourse.paraview.org/t/liggths-questions/9172)

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**Author:** [@mabrouka](https://discourse.paraview.org/u/mabrouka)\
**Replies:** 1\
**Last updated:** [March 14, 2022, 7:39am UTC](https://discourse.paraview.org/t/liggths-questions/9172 "2022-03-14T07:39:28Z")

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Hi everyone, I ran a tutorial of cfdem, but I could not get results in paraview even if I dump stl or vtk files here are the inputs of liggghts Regards in.liggghts\_resume (2.2 KB) in.liggghts\_init (2.3 KB)

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## [Spatial averaging over the domain](https://discourse.paraview.org/t/spatial-averaging-over-the-domain/9171)

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**Author:** [@RaviGupta](https://discourse.paraview.org/u/RaviGupta)\
**Replies:** 0\
**Last updated:** [March 14, 2022, 7:37am UTC](https://discourse.paraview.org/t/spatial-averaging-over-the-domain/9171 "2022-03-14T07:37:48Z")

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Hi, I’m trying to find the domain-wide spatial average of a scalar quantity q. I’m working with a non-uniform grid. The python calculator has a mean option. However, it is stated that it returns the average of the array…

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## [time average particles velocity](https://discourse.paraview.org/t/time-average-particles-velocity/5231)

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**Author:** [@Hossein4142](https://discourse.paraview.org/u/Hossein4142)\
**Replies:** 7\
**Last updated:** [September 15, 2020, 2:59pm UTC](https://discourse.paraview.org/t/time-average-particles-velocity/5231 "2020-09-15T14:59:02Z")

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Hi I have .pvd and .vtp files (result of mfix). this files are about particle data. I want to export time average particle y-velocity . how can i do it?

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## [Laplacian of vector](https://discourse.paraview.org/t/laplacian-of-vector/9144)

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**Author:** [@Darshan](https://discourse.paraview.org/u/Darshan)\
**Replies:** 2\
**Last updated:** [March 13, 2022, 3:38pm UTC](https://discourse.paraview.org/t/laplacian-of-vector/9144 "2022-03-13T15:38:27Z")

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Hello everyone, I am struggling to calculate the Laplacian of vorticity vector with python calculator filter. However, I didn’t face any problem in calculating the divergence of 2D vectors and gradient of 2D vector and …

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