# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?no_subcategories=false&page=210

[Latest](https://discourse.paraview.org/latest.md) · [Categories](https://discourse.paraview.org/categories.md) · [Tags](https://discourse.paraview.org/tags.md)

**Page:** 211

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## [How to extract data from .pvtr in python?](https://discourse.paraview.org/t/how-to-extract-data-from-pvtr-in-python/2008)

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**Author:** [@Vis](https://discourse.paraview.org/u/Vis)\
**Replies:** 1\
**Last updated:** [June 10, 2019, 8:09am UTC](https://discourse.paraview.org/t/how-to-extract-data-from-pvtr-in-python/2008 "2019-06-10T08:09:54Z")

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I have a 2D CFD field, 10+ variables stored in space at point. I want the data as a 2D numpy array in python from a given .pvtr file. I have tried using vtk python library. Kernal crashes as soon as I try and access the…

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## [How to make 2D data look like more realistic in 3D view?](https://discourse.paraview.org/t/how-to-make-2d-data-look-like-more-realistic-in-3d-view/1976)

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**Author:** [@ejtovar](https://discourse.paraview.org/u/ejtovar)\
**Replies:** 7\
**Last updated:** [June 7, 2019, 7:20pm UTC](https://discourse.paraview.org/t/how-to-make-2d-data-look-like-more-realistic-in-3d-view/1976 "2019-06-07T19:20:34Z")

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Hi everyone, I have a 2D vtk data set composed of x and y coordinates with a respective elevation for each point. I would like to make my data look a bit more “realistic” in the 3D view. In the attached photo, I have us…

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## [pvpython: How to save several datasets at once?](https://discourse.paraview.org/t/pvpython-how-to-save-several-datasets-at-once/2003)

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**Author:** [@Terry](https://discourse.paraview.org/u/Terry)\
**Replies:** 2\
**Last updated:** [June 7, 2019, 1:48pm UTC](https://discourse.paraview.org/t/pvpython-how-to-save-several-datasets-at-once/2003 "2019-06-07T13:48:54Z")

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Hello, I am looking for a way to safe the data of several independent filters at once using paraview.simple I just began programming with python, so please give me a hint even though the awnser might be obviously to yo…

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## [Unable to save temporal file-series in any Image Format](https://discourse.paraview.org/t/unable-to-save-temporal-file-series-in-any-image-format/1988)

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**Author:** [@leopessanha](https://discourse.paraview.org/u/leopessanha)\
**Replies:** 3\
**Last updated:** [June 6, 2019, 9:03pm UTC](https://discourse.paraview.org/t/unable-to-save-temporal-file-series-in-any-image-format/1988 "2019-06-06T21:03:56Z")

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Hi! I am trying to save a .vtk file-series with 10k timesteps in png, jpeg or tiff format, but when doing it only saves one step at a time. These writers do not support writing timesteps as file-series? If so, any tip…

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## [problems to animate particles from a dem based model](https://discourse.paraview.org/t/problems-to-animate-particles-from-a-dem-based-model/2000)

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**Author:** [@hgropelli](https://discourse.paraview.org/u/hgropelli)\
**Replies:** 0\
**Last updated:** [June 6, 2019, 3:37pm UTC](https://discourse.paraview.org/t/problems-to-animate-particles-from-a-dem-based-model/2000 "2019-06-06T15:37:28Z")

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Hello! im new on paraview, actually i use GiD for post processing and im doing a process to adapt my models from fortran which give gid outputs to paraview. In this simulation, the particles arent moving, they stay stat…

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## [Find Displacement Between Two Vtp Models](https://discourse.paraview.org/t/find-displacement-between-two-vtp-models/1987)

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**Author:** [@meow](https://discourse.paraview.org/u/meow)\
**Replies:** 6\
**Last updated:** [June 5, 2019, 1:00pm UTC](https://discourse.paraview.org/t/find-displacement-between-two-vtp-models/1987 "2019-06-05T13:00:34Z")

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I have two .vtp models that I have imported into paraview. The models have the same number of points. I need to find the displacement between the points in Model 1 and Model 2 and export it as a .CSV file. I can export…

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## [How embedding Python Source as Modules?](https://discourse.paraview.org/t/how-embedding-python-source-as-modules/1978)

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**Author:** [@e-kolosov](https://discourse.paraview.org/u/e-kolosov)\
**Replies:** 15\
**Last updated:** [June 5, 2019, 10:08am UTC](https://discourse.paraview.org/t/how-embedding-python-source-as-modules/1978 "2019-06-05T10:08:56Z")

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Hello. I read the instruction https://www.paraview.org/Wiki/ParaView/Plugin\_HowTo and build a simple HelloWorldRedaer but it doesn’t work. It load a dynamic library but can’t apply a HelloWorldReader reader. What I…

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## [Can only use pvbatch? when setup pvserver on linux and connect it from another windows machine by paraview GUI](https://discourse.paraview.org/t/can-only-use-pvbatch-when-setup-pvserver-on-linux-and-connect-it-from-another-windows-machine-by-paraview-gui/1989)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 1\
**Last updated:** [June 5, 2019, 7:21am UTC](https://discourse.paraview.org/t/can-only-use-pvbatch-when-setup-pvserver-on-linux-and-connect-it-from-another-windows-machine-by-paraview-gui/1989 "2019-06-05T07:21:28Z")

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Dear Experts, I want to set client-server mode in linux-window machine. However, when i launch pvserver on linux, it is always failed connection when try to connect server from another window machine by paraview GUI, an…

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## [how can I output the coordinates of the faces of a wireframe?](https://discourse.paraview.org/t/how-can-i-output-the-coordinates-of-the-faces-of-a-wireframe/1960)

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**Author:** [@fabio.romani](https://discourse.paraview.org/u/fabio.romani)\
**Replies:** 4\
**Last updated:** [June 4, 2019, 3:29pm UTC](https://discourse.paraview.org/t/how-can-i-output-the-coordinates-of-the-faces-of-a-wireframe/1960 "2019-06-04T15:29:17Z")

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Hi, I can’t seem to find a way to print the coordinates of each face forming the mesh (wireframe) on my polygon. Is there an easy script to write a text file (or even output on the screen) that does that? Thanks Fabio …

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## [Unable to clip properly for volume rendered visualization](https://discourse.paraview.org/t/unable-to-clip-properly-for-volume-rendered-visualization/1951)

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**Author:** [@opliew13](https://discourse.paraview.org/u/opliew13)\
**Replies:** 2\
**Last updated:** [June 3, 2019, 4:56pm UTC](https://discourse.paraview.org/t/unable-to-clip-properly-for-volume-rendered-visualization/1951 "2019-06-03T16:56:06Z")

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Hi, I have a python script that is supposed to do a box clip on a volume rendered image, but the clipping seems wrong and I’m not sure how to fix it. I copied my code into ParaView and ran it in the Python shell and it…

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## [OSPray rendering with pvserver](https://discourse.paraview.org/t/ospray-rendering-with-pvserver/1954)

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**Author:** [@Daan\_van\_Vugt](https://discourse.paraview.org/u/Daan_van_Vugt)\
**Replies:** 2\
**Last updated:** [June 3, 2019, 1:28pm UTC](https://discourse.paraview.org/t/ospray-rendering-with-pvserver/1954 "2019-06-03T13:28:25Z")

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Hi, I’m trying to render images with OSPRay on a KNL machine through pvserver (OSmesa superbuild of PV). I can connect fine, and images show up but it seems they are ray-traced locally. Is there a way to setup the rayt…

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## [Plot V.Misses stress over time](https://discourse.paraview.org/t/plot-v-misses-stress-over-time/1948)

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**Author:** [@Sergio\_Pluchinsky](https://discourse.paraview.org/u/Sergio_Pluchinsky)\
**Replies:** 1\
**Last updated:** [June 3, 2019, 12:51pm UTC](https://discourse.paraview.org/t/plot-v-misses-stress-over-time/1948 "2019-06-03T12:51:05Z")

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COMPRESION.pvsm (292.4 KB) COMPRESION.rmed (2.4 MB) Hi, I have an .rmed file of a no lineal static analisys (solver was Calculix, results were converted from .frd using Calmed), were I can show the V. Misses stress, an…

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## [How to choose the time step to be processed in a python script](https://discourse.paraview.org/t/how-to-choose-the-time-step-to-be-processed-in-a-python-script/1969)

<div class="topic-metadata">

**Author:** [@Emanuele\_Leggio](https://discourse.paraview.org/u/Emanuele_Leggio)\
**Replies:** 2\
**Last updated:** [June 3, 2019, 12:41pm UTC](https://discourse.paraview.org/t/how-to-choose-the-time-step-to-be-processed-in-a-python-script/1969 "2019-06-03T12:41:01Z")

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Hi all, I’ve written several scripts that open XMF files and processing them creates other entities that are saved to disk. I have worked with XMF files that contain only one time-step, now I would like to switch to tem…

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## [Make camera "Follow Path" follow an already defined path](https://discourse.paraview.org/t/make-camera-follow-path-follow-an-already-defined-path/1970)

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**Author:** [@daviddoria](https://discourse.paraview.org/u/daviddoria)\
**Replies:** 2\
**Last updated:** [May 31, 2019, 4:29pm UTC](https://discourse.paraview.org/t/make-camera-follow-path-follow-an-already-defined-path/1970 "2019-05-31T16:29:13Z")

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Hi guys, In the Animation view, when I add a ‘Camera - Follow Path’ it lets me create a spline that the camera will follow. However, I already have a spline in the Pipeline Browser - can I just tell the camera to follow…

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## [When using python script, screenshot records blank](https://discourse.paraview.org/t/when-using-python-script-screenshot-records-blank/1915)

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**Author:** [@wl032](https://discourse.paraview.org/u/wl032)\
**Replies:** 6\
**Last updated:** [May 31, 2019, 4:04pm UTC](https://discourse.paraview.org/t/when-using-python-script-screenshot-records-blank/1915 "2019-05-31T16:04:13Z")

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My purpose is to do some batch processing, and take screen shots. Here is the script. #### import the simple module from the paraview from paraview.simple import \* #### disable automatic camera reset on 'Show' paraview…

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## [Loading large VTK files](https://discourse.paraview.org/t/loading-large-vtk-files/1941)

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**Author:** [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)\
**Replies:** 2\
**Last updated:** [May 31, 2019, 12:47pm UTC](https://discourse.paraview.org/t/loading-large-vtk-files/1941 "2019-05-31T12:47:33Z")

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Continuing the discussion from Define an arbitrary line: This is a separate topic from the original discussion, so I split it into a new one. 100M+ elements is fairly for serial processing. Are your data files stored …

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## [Issues about .pvd file](https://discourse.paraview.org/t/issues-about-pvd-file/1930)

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**Author:** [@wl032](https://discourse.paraview.org/u/wl032)\
**Replies:** 4\
**Last updated:** [May 31, 2019, 9:23am UTC](https://discourse.paraview.org/t/issues-about-pvd-file/1930 "2019-05-31T09:23:01Z")

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Hello, I produced a bunch of .vtu files, and all these guys work well. Now, I need to link them in time sequence. My .pvd file looks like this. \<?xml version="1.0"?\> \<VTKFile type="Collection" version="0.1" byte\_order…

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## [error in brigand.hpp VTKm](https://discourse.paraview.org/t/error-in-brigand-hpp-vtkm/1953)

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**Author:** [@uturuncoglu](https://discourse.paraview.org/u/uturuncoglu)\
**Replies:** 7\
**Last updated:** [May 31, 2019, 6:26am UTC](https://discourse.paraview.org/t/error-in-brigand-hpp-vtkm/1953 "2019-05-31T06:26:22Z")

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Hi, When I try to build ParaView 5.6.0 from source, I am getting following error related with VTKm. Is it known problem? If yes, is there any fix for it? \[ 14%\] Building CUDA object VTK/ThirdParty/vtkm/vtk-m/vtkm/cont/…

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## [Can I hide selected cells?](https://discourse.paraview.org/t/can-i-hide-selected-cells/1972)

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**Author:** [@yw5aj](https://discourse.paraview.org/u/yw5aj)\
**Replies:** 2\
**Last updated:** [May 31, 2019, 12:53am UTC](https://discourse.paraview.org/t/can-i-hide-selected-cells/1972 "2019-05-31T00:53:54Z")

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Dear all, In the GUI, I am using Paraview to show a VTK file of a mesh consisting of tetrahedrons. Is there a way that I can hide selected cells? For example, can I change the display alpha of the selected cells? Best, …

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## [Assemblies](https://discourse.paraview.org/t/assemblies/1971)

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**Author:** [@wascott](https://discourse.paraview.org/u/wascott)\
**Replies:** 0\
**Last updated:** [May 30, 2019, 5:46pm UTC](https://discourse.paraview.org/t/assemblies/1971 "2019-05-30T17:46:43Z")

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On the Exodus reader page, next to Blocks, is listed Assemblies. What are these, and how are they used?

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## [Cannot Fetch AMR Arrays](https://discourse.paraview.org/t/cannot-fetch-amr-arrays/1927)

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**Author:** [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)\
**Replies:** 1\
**Last updated:** [May 28, 2019, 2:25pm UTC](https://discourse.paraview.org/t/cannot-fetch-amr-arrays/1927 "2019-05-28T14:25:54Z")

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Hello. I am trying to fetch data from an AMR dataset, but find that this process doesn’t include the point or cell arrays. When I check the data arrays I see that I only have one cell array for “vtkGhostType”. I’ve gon…

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## [Rendering CML files with OSPRay](https://discourse.paraview.org/t/rendering-cml-files-with-ospray/1890)

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**Author:** [@mariavd](https://discourse.paraview.org/u/mariavd)\
**Replies:** 1\
**Last updated:** [May 28, 2019, 1:59pm UTC](https://discourse.paraview.org/t/rendering-cml-files-with-ospray/1890 "2019-05-28T13:59:30Z")

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Hello, I have been using CML format to render molecules in Paraview and do further visual analyses of quantum chemistry data, such as using the Stream Tracer. I recently learned that OSPRay is supposed to be more effici…

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## [Projecting CFD results into a FEM mesh](https://discourse.paraview.org/t/projecting-cfd-results-into-a-fem-mesh/1938)

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**Author:** [@Msegade](https://discourse.paraview.org/u/Msegade)\
**Replies:** 2\
**Last updated:** [May 28, 2019, 11:09am UTC](https://discourse.paraview.org/t/projecting-cfd-results-into-a-fem-mesh/1938 "2019-05-28T11:09:25Z")

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Hi I have some results from a CFD analysis and I want to project (I’m not sure of the right term map, interpolate?) the pressure values available at nodes to pressure values in each element for the FEM mesh. The meshes …

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## [Which python version is the recommended for latest paraview on github?](https://discourse.paraview.org/t/which-python-version-is-the-recommended-for-latest-paraview-on-github/1933)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 2\
**Last updated:** [May 28, 2019, 8:37am UTC](https://discourse.paraview.org/t/which-python-version-is-the-recommended-for-latest-paraview-on-github/1933 "2019-05-28T08:37:01Z")

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Dear Experts, To build and run paraview with python, i want to know which python version is the recommended? Thanks and Best Regards, Sharon

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## [Interactive select points in 2D](https://discourse.paraview.org/t/interactive-select-points-in-2d/1904)

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**Author:** [@mzenker](https://discourse.paraview.org/u/mzenker)\
**Replies:** 6\
**Last updated:** [May 28, 2019, 8:25am UTC](https://discourse.paraview.org/t/interactive-select-points-in-2d/1904 "2019-05-28T08:25:43Z")

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Hi, I have a (hopefully) simple question: I visualize a 2D vtu data set (result of a simulation with Elmer) and want to select one or several points. My 2D geometry is in the xy plane, and I view it with the “-z” view. …

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## [paraview map velocity field to surface](https://discourse.paraview.org/t/paraview-map-velocity-field-to-surface/1919)

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**Author:** [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)\
**Replies:** 2\
**Last updated:** [May 24, 2019, 7:20pm UTC](https://discourse.paraview.org/t/paraview-map-velocity-field-to-surface/1919 "2019-05-24T19:20:05Z")

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Hi All, I am new in paraview and I want to map velocity field to the surface, does anyone can help me? best, Arghavan

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## [Export Scene Error Message](https://discourse.paraview.org/t/export-scene-error-message/1925)

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**Author:** [@samella](https://discourse.paraview.org/u/samella)\
**Replies:** 1\
**Last updated:** [May 24, 2019, 5:25pm UTC](https://discourse.paraview.org/t/export-scene-error-message/1925 "2019-05-24T17:25:44Z")

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Hi! I’m just trying to export a graphic on a pdf format and I keep getting this error messages: ERROR: In C:\\bbd\\7cc78367\\build\\superbuild\\paraview\\src\\VTK\\IO\\ExportOpenGL2\\vtkOpenGLGL2PSExporter.cxx, line 70 vtkPVGL2P…

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## [Save specific field data](https://discourse.paraview.org/t/save-specific-field-data/1921)

<div class="topic-metadata">

**Author:** [@lorak41](https://discourse.paraview.org/u/lorak41)\
**Replies:** 2\
**Last updated:** [May 24, 2019, 11:38am UTC](https://discourse.paraview.org/t/save-specific-field-data/1921 "2019-05-24T11:38:27Z")

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Hi, I have a vtk file that has many fields (data points, attributes). What is the best way to save this file with only one field, lets say called “Pressure”? Or is there a way to delete Attributes / Fields? Cheers

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## [from mpi4py import MPI ImportError: No module named mpi4py](https://discourse.paraview.org/t/from-mpi4py-import-mpi-importerror-no-module-named-mpi4py/1916)

<div class="topic-metadata">

**Author:** [@hdz19900725](https://discourse.paraview.org/u/hdz19900725)\
**Replies:** 5\
**Last updated:** [May 24, 2019, 9:43am UTC](https://discourse.paraview.org/t/from-mpi4py-import-mpi-importerror-no-module-named-mpi4py/1916 "2019-05-24T09:43:08Z")

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Hello, I have a question that when I use find data in paraview and my settings are as follows: When I click Run Selection Query, the Output message dialog looks lile this: I use paraview 5.6 mpi version, does anyo…

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## [Field Data in Paraview Spreadsheet View](https://discourse.paraview.org/t/field-data-in-paraview-spreadsheet-view/1911)

<div class="topic-metadata">

**Author:** [@siver](https://discourse.paraview.org/u/siver)\
**Replies:** 5\
**Last updated:** [May 24, 2019, 8:35am UTC](https://discourse.paraview.org/t/field-data-in-paraview-spreadsheet-view/1911 "2019-05-24T08:35:09Z")

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Dear devs, I have the following problem: Paraview 5.6.0 does not show Field Data in the “SpreadSheet view”, stored within a vtm file. They are vtkFloatArray’s with proper names. What are possible reasons for this and ho…

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