# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=149

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**Page:** 150

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## [paraview crashes when openning a specific variable from openfoam results](https://discourse.paraview.org/t/paraview-crashes-when-openning-a-specific-variable-from-openfoam-results/6650)

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**Author:** [@mohammad\_faghih](https://discourse.paraview.org/u/mohammad_faghih)\
**Replies:** 5\
**Last updated:** [March 15, 2021, 7:03pm UTC](https://discourse.paraview.org/t/paraview-crashes-when-openning-a-specific-variable-from-openfoam-results/6650 "2021-03-15T19:03:03Z")

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I have a solution from an openFOAM simulation. In addition to velocity (U) and pressure ( p), I also have a user-defined variable (called D) in each time folder. This D is actually a scalar being transported in my domain…

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## [ParaView error: Algorithm vtkDICOMImageReader returned failure for request](https://discourse.paraview.org/t/paraview-error-algorithm-vtkdicomimagereader-returned-failure-for-request/6712)

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**Author:** [@majo\_vlas](https://discourse.paraview.org/u/majo_vlas)\
**Replies:** 0\
**Last updated:** [March 15, 2021, 6:22pm UTC](https://discourse.paraview.org/t/paraview-error-algorithm-vtkdicomimagereader-returned-failure-for-request/6712 "2021-03-15T18:22:08Z")

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Hello! I’m trying to open some DICOM files with ParaView 5.6.3 (also with ParaView 5.7) and I’m getting this error ERROR: In /Users/kitware/dashboards/buildbot-slave/a64f5607/build/superbuild/paraview/src/VTK/IO/Image/v…

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## [Progress Bar in 5.9.0](https://discourse.paraview.org/t/progress-bar-in-5-9-0/6707)

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**Author:** [@jmlink](https://discourse.paraview.org/u/jmlink)\
**Replies:** 5\
**Last updated:** [March 15, 2021, 5:12pm UTC](https://discourse.paraview.org/t/progress-bar-in-5-9-0/6707 "2021-03-15T17:12:56Z")

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I just downloaded 5.9.0 and loaded a state file from 5.8.0. It has a progress bar with a secondary color selected and the option selected to show the background . In 5.8.0 the progress bar updated correctly with the prog…

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## [Paraview 5.9.0 cannot find Matplotlib.](https://discourse.paraview.org/t/paraview-5-9-0-cannot-find-matplotlib/6702)

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**Author:** [@Andythe\_great](https://discourse.paraview.org/u/Andythe_great)\
**Replies:** 3\
**Last updated:** [March 15, 2021, 4:54pm UTC](https://discourse.paraview.org/t/paraview-5-9-0-cannot-find-matplotlib/6702 "2021-03-15T16:54:17Z")

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I install matplotlib but, Paraview cannot find matplotlib 2.6.1. Matplotlib exist in the similar path as numpy. /app/lib/python3.8/site-packages/matplotlib Are there compile flags or settings I can make Paraview find …

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## [Airfoil Upper and Lower Cp (non-extractable geometry)](https://discourse.paraview.org/t/airfoil-upper-and-lower-cp-non-extractable-geometry/6706)

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**Author:** [@tripatha](https://discourse.paraview.org/u/tripatha)\
**Replies:** 0\
**Last updated:** [March 15, 2021, 3:37pm UTC](https://discourse.paraview.org/t/airfoil-upper-and-lower-cp-non-extractable-geometry/6706 "2021-03-15T15:37:43Z")

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What is the best way to calculate the Cp on the upper and lower surface of an airfoil when you have a non-extractable geometry?

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## [SaveScreenshot very slow with opacity \< 1](https://discourse.paraview.org/t/savescreenshot-very-slow-with-opacity-1/6685)

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**Author:** [@dax\_00](https://discourse.paraview.org/u/dax_00)\
**Replies:** 5\
**Last updated:** [March 15, 2021, 3:01pm UTC](https://discourse.paraview.org/t/savescreenshot-very-slow-with-opacity-1/6685 "2021-03-15T15:01:21Z")

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Dear All, I wrote a script for postprocessing pressure data on surfaces. I noticed that when a geometry is plotted with opacity \< 1 the SaveScreenshot command takes very long (60 seconds vs 1 second if I set opacity to…

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## [How to define a single scalar as an input parameter for Programmable Filter](https://discourse.paraview.org/t/how-to-define-a-single-scalar-as-an-input-parameter-for-programmable-filter/6695)

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**Author:** [@parajan](https://discourse.paraview.org/u/parajan)\
**Replies:** 1\
**Last updated:** [March 15, 2021, 1:00pm UTC](https://discourse.paraview.org/t/how-to-define-a-single-scalar-as-an-input-parameter-for-programmable-filter/6695 "2021-03-15T13:00:06Z")

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I would like to create a custom filter consisting of the programmable filter and others. The programmable filter has a hardcoded parameter in it, that I would like to define as an input parameter. Is that possible? As a…

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## [Mesh doesn't show up properly in Paraview](https://discourse.paraview.org/t/mesh-doesnt-show-up-properly-in-paraview/4477)

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**Author:** [@ANON1](https://discourse.paraview.org/u/ANON1)\
**Replies:** 10\
**Last updated:** [March 15, 2021, 8:59am UTC](https://discourse.paraview.org/t/mesh-doesnt-show-up-properly-in-paraview/4477 "2021-03-15T08:59:49Z")

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Hello, I made a structured mesh in Pointwise 18.3. As you can see in this screenshort, the mesh near the wall is orthogonal and straight: However when I export it to OpenFOAM format and open it in Paraview 5.6 and 5.…

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## [I Flatpak Paraview, any thought?](https://discourse.paraview.org/t/i-flatpak-paraview-any-thought/6698)

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**Author:** [@Andythe\_great](https://discourse.paraview.org/u/Andythe_great)\
**Replies:** 1\
**Last updated:** [March 15, 2021, 5:31am UTC](https://discourse.paraview.org/t/i-flatpak-paraview-any-thought/6698 "2021-03-15T05:31:48Z")

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Hello, I create Flatpak for Paraview. Flatpak is a packaging and distributing desktop software on Linux. I would like it to be submit to Flathub, an app store for Flatpak apps. Many Linux distros supported Flatpak. S…

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## [Updating mesh and point data using python](https://discourse.paraview.org/t/updating-mesh-and-point-data-using-python/4075)

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**Author:** [@Zetison](https://discourse.paraview.org/u/Zetison)\
**Replies:** 10\
**Last updated:** [March 14, 2021, 12:51pm UTC](https://discourse.paraview.org/t/updating-mesh-and-point-data-using-python/4075 "2021-03-14T12:51:23Z")

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I have a python program that updates the mesh and point data based on user input (sliders in matplotlib.widgets). Is it possible to write and update the paraview.servermanager object directly instead of writing to a file…

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## [DSMC - Calculate partilces passing through surface](https://discourse.paraview.org/t/dsmc-calculate-partilces-passing-through-surface/6683)

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**Author:** [@Owen99](https://discourse.paraview.org/u/Owen99)\
**Replies:** 2\
**Last updated:** [March 13, 2021, 2:26pm UTC](https://discourse.paraview.org/t/dsmc-calculate-partilces-passing-through-surface/6683 "2021-03-13T14:26:32Z")

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Hi All, I have a basic hollow cylinder (shown below) simulated in DSMCFoam. I set up a slice plane then a cylinderical clip so a surface would be used at the inlet and later the outlet. Is it possible to know the numbe…

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## [How to use two GPUs on a single node?](https://discourse.paraview.org/t/how-to-use-two-gpus-on-a-single-node/6681)

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**Author:** [@jone](https://discourse.paraview.org/u/jone)\
**Replies:** 1\
**Last updated:** [March 12, 2021, 9:03am UTC](https://discourse.paraview.org/t/how-to-use-two-gpus-on-a-single-node/6681 "2021-03-12T09:03:58Z")

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I need to render a large scale data, so I need to use two GPUs, but I found that one of the GPUs is not used, and the frame rate is very low when only using one GPU. Is there a way to use two GPUs together? When I was r…

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## [Converting NAN to a number](https://discourse.paraview.org/t/converting-nan-to-a-number/6668)

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**Author:** [@wascott](https://discourse.paraview.org/u/wascott)\
**Replies:** 4\
**Last updated:** [March 12, 2021, 3:04am UTC](https://discourse.paraview.org/t/converting-nan-to-a-number/6668 "2021-03-12T03:04:16Z")

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When I am creating a plot over line filter, across a hollow (such as disk\_out\_ref.exo), I am correctly getting nans for variables on the line. This is failing with subsequent filters. Is there a way to convert these na…

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## [finding and outputting max point for plot over line](https://discourse.paraview.org/t/finding-and-outputting-max-point-for-plot-over-line/5417)

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**Author:** [@wascott](https://discourse.paraview.org/u/wascott)\
**Replies:** 8\
**Last updated:** [March 12, 2021, 2:51am UTC](https://discourse.paraview.org/t/finding-and-outputting-max-point-for-plot-over-line/5417 "2021-03-12T02:51:40Z")

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I have a user that needs to run dozens of plot over lines through his dataset, find the maximum value, and write this value out. This needs to occur in parallel. Here is an example: Remote paraview. Further, this ex…

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## [Missing Time Marker](https://discourse.paraview.org/t/missing-time-marker/6676)

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**Author:** [@Captain\_Convergence](https://discourse.paraview.org/u/Captain_Convergence)\
**Replies:** 0\
**Last updated:** [March 11, 2021, 8:49pm UTC](https://discourse.paraview.org/t/missing-time-marker/6676 "2021-03-11T20:49:39Z")

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Hi all, I ran into a quite strange problem in paraview, I am using the plotDataOverTime filter after a temporaryShiftedData filter and the time marker is not displayed during the animation: Only if I zoom out I can s…

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## [Programmable Filter in Parallel | Error in vtkPointLocator](https://discourse.paraview.org/t/programmable-filter-in-parallel-error-in-vtkpointlocator/6653)

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**Author:** [@dax\_00](https://discourse.paraview.org/u/dax_00)\
**Replies:** 1\
**Last updated:** [March 11, 2021, 11:18am UTC](https://discourse.paraview.org/t/programmable-filter-in-parallel-error-in-vtkpointlocator/6653 "2021-03-11T11:18:04Z")

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Dear All, I am working on a programmableFilter in Paraview 5.6.1 The input data is composed by some vtp(s) that are fed to the filter. I am having some trouble when i run my script with mpiexec. The error message says…

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## [Paraview 5.9 from website not working in F33?](https://discourse.paraview.org/t/paraview-5-9-from-website-not-working-in-f33/6461)

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**Author:** [@Root-voidX](https://discourse.paraview.org/u/Root-voidX)\
**Replies:** 2\
**Last updated:** [March 11, 2021, 10:02am UTC](https://discourse.paraview.org/t/paraview-5-9-from-website-not-working-in-f33/6461 "2021-03-11T10:02:37Z")

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Hello everyone, I noticed something with paraview on Fedora 33. It errors out with segfault, while when I ran it inside a Fedora 32 docker, it ran fine. This is the error: SI  localhost  ~  Downloads/ParaView-5.9.…

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## [Building cmake](https://discourse.paraview.org/t/building-cmake/6670)

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**Author:** [@salomchedlidze](https://discourse.paraview.org/u/salomchedlidze)\
**Replies:** 1\
**Last updated:** [March 11, 2021, 9:27am UTC](https://discourse.paraview.org/t/building-cmake/6670 "2021-03-11T09:27:15Z")

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Hello again, I am using MacOS but I want to build ParaView on a computing cluster. When I tried to build cmake, it was giving this error: CMake Error at Source/kwsys/cmake\_install.cmake:46 (file): file cannot create …

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## [Updating macOS port on Macports to v5.8.0, vtk gets installed into /usr/local/](https://discourse.paraview.org/t/updating-macos-port-on-macports-to-v5-8-0-vtk-gets-installed-into-usr-local/3835)

<div class="topic-metadata">

**Author:** [@rdbisme](https://discourse.paraview.org/u/rdbisme)\
**Replies:** 14\
**Last updated:** [March 11, 2021, 8:55am UTC](https://discourse.paraview.org/t/updating-macos-port-on-macports-to-v5-8-0-vtk-gets-installed-into-usr-local/3835 "2021-03-11T08:55:31Z")

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Hello, I’m trying to bump the version of Paraview on Macports, but after updating the version, the build gets to 100%, but VTK tries to get installed into /usr/local. I have the feeling that the option -DMACOS\_APP\_INST…

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## [Create parallel programmable filter](https://discourse.paraview.org/t/create-parallel-programmable-filter/6660)

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**Author:** [@woodscn](https://discourse.paraview.org/u/woodscn)\
**Replies:** 2\
**Last updated:** [March 9, 2021, 11:37pm UTC](https://discourse.paraview.org/t/create-parallel-programmable-filter/6660 "2021-03-09T23:37:49Z")

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I have a few programmable filters that take a long time to execute. I’ve done my best to optimize the single-threaded performance, and now I’m looking at other options for speeding things up. It appears that the Programm…

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## [paraview-superbuild for optix ppc64le](https://discourse.paraview.org/t/paraview-superbuild-for-optix-ppc64le/6661)

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**Author:** [@danlipsa](https://discourse.paraview.org/u/danlipsa)\
**Replies:** 8\
**Last updated:** [March 9, 2021, 10:45pm UTC](https://discourse.paraview.org/t/paraview-superbuild-for-optix-ppc64le/6661 "2021-03-09T22:45:42Z")

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I am trying to compile paraview on a P9 (ppc64le) machine (summit) with Optix and I get an error at install time - every compiled successfully. Strangely, the library where it fails dds.so seems to be a i86 library. @ben…

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## [Calculator Does Not Work With Partial Dataset](https://discourse.paraview.org/t/calculator-does-not-work-with-partial-dataset/1599)

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**Author:** [@Aandreyev](https://discourse.paraview.org/u/Aandreyev)\
**Replies:** 3\
**Last updated:** [March 9, 2021, 2:39pm UTC](https://discourse.paraview.org/t/calculator-does-not-work-with-partial-dataset/1599 "2021-03-09T14:39:38Z")

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Hello all, I have an AMR data set where the data is only stored on the leaf nodes. Thus all datasets come up as partial, which is fine. However, the calculator does not seem to work with them. It cannot parse the equati…

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## [Append processed data to existing geometry](https://discourse.paraview.org/t/append-processed-data-to-existing-geometry/6657)

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**Author:** [@Gr\_Jack](https://discourse.paraview.org/u/Gr_Jack)\
**Replies:** 0\
**Last updated:** [March 9, 2021, 2:16pm UTC](https://discourse.paraview.org/t/append-processed-data-to-existing-geometry/6657 "2021-03-09T14:16:05Z")

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I fetch data from an existing field and used pvpython method to process the data. The main python program is here: rawData = servermanager.Fetch(slice1) data = dsa.WrapDataObject(rawData) var1 = data.PointData\['T'\]…

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## [Could not determine discrete values to use for annotations](https://discourse.paraview.org/t/could-not-determine-discrete-values-to-use-for-annotations/6630)

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**Author:** [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)\
**Replies:** 5\
**Last updated:** [March 9, 2021, 2:04pm UTC](https://discourse.paraview.org/t/could-not-determine-discrete-values-to-use-for-annotations/6630 "2021-03-09T14:04:52Z")

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I’m trying to create a discrete color bar for my data. When I click “Interpret Values as Categories” in the Color Map Editor I am presented with this warning: Though my dataset consists of integers and has less than …

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## [Find x,y,z coordinates in a PointVolumeInterpolator filter](https://discourse.paraview.org/t/find-x-y-z-coordinates-in-a-pointvolumeinterpolator-filter/6655)

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**Author:** [@ahollywood](https://discourse.paraview.org/u/ahollywood)\
**Replies:** 0\
**Last updated:** [March 9, 2021, 1:04pm UTC](https://discourse.paraview.org/t/find-x-y-z-coordinates-in-a-pointvolumeinterpolator-filter/6655 "2021-03-09T13:04:36Z")

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I have a CFD output I am visualizing within Paraview. To reduce the number of points, I interpolated my points using the PointVolumeInterpolator filter. Each point has a PointID, but I need the x,y,z coordinate for each …

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## [Time Varying with Python Programmable Source](https://discourse.paraview.org/t/time-varying-with-python-programmable-source/6029)

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**Author:** [@stevenrend](https://discourse.paraview.org/u/stevenrend)\
**Replies:** 1\
**Last updated:** [March 9, 2021, 12:27pm UTC](https://discourse.paraview.org/t/time-varying-with-python-programmable-source/6029 "2021-03-09T12:27:30Z")

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Dear all, I want to display Time Varying data in Paraview as explained in : https://www.paraview.org/Wiki/ParaView/Simple\_ParaView\_3\_Python\_Filters#Producing\_Data\_with\_Timesteps\_.28Source.29 The problem I am encounteri…

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## [Time marker options in plotDataOverTimeFilter](https://discourse.paraview.org/t/time-marker-options-in-plotdataovertimefilter/6625)

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**Author:** [@Captain\_Convergence](https://discourse.paraview.org/u/Captain_Convergence)\
**Replies:** 6\
**Last updated:** [March 9, 2021, 9:09am UTC](https://discourse.paraview.org/t/time-marker-options-in-plotdataovertimefilter/6625 "2021-03-09T09:09:54Z")

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Hi all, I ran into a quite strange problem in paraview, I am using the plotDataOverTime filter after a temporaryShiftedData filter and the time marker is not displayed during the animation: Only if I zoom out I can s…

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## [Which file format is right for me?](https://discourse.paraview.org/t/which-file-format-is-right-for-me/6633)

<div class="topic-metadata">

**Author:** [@flotus1](https://discourse.paraview.org/u/flotus1)\
**Replies:** 4\
**Last updated:** [March 9, 2021, 7:35am UTC](https://discourse.paraview.org/t/which-file-format-is-right-for-me/6633 "2021-03-09T07:35:46Z")

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Could someone recommend a file format for transient result files from a CFD solver to read and analyze in ParaView? So far, I have been using ensight gold file format to get the data from my fluid simulations into ParaV…

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## [Remove Partial Datasets in OverlappingAMR Dataset](https://discourse.paraview.org/t/remove-partial-datasets-in-overlappingamr-dataset/6652)

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**Author:** [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)\
**Replies:** 0\
**Last updated:** [March 9, 2021, 6:01am UTC](https://discourse.paraview.org/t/remove-partial-datasets-in-overlappingamr-dataset/6652 "2021-03-09T06:01:28Z")

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For one project I’m currently stuck using PV v5.6 and I need to use the Calculator on a vtkOverlappingAMR dataset with partial datasets. This doesn’t work, as has been previously mentioned here. I know that this has bee…

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## [Convert a .vtk to a 3D voxel-based image](https://discourse.paraview.org/t/convert-a-vtk-to-a-3d-voxel-based-image/6629)

<div class="topic-metadata">

**Author:** [@aabdallah](https://discourse.paraview.org/u/aabdallah)\
**Replies:** 6\
**Last updated:** [March 8, 2021, 1:35pm UTC](https://discourse.paraview.org/t/convert-a-vtk-to-a-3d-voxel-based-image/6629 "2021-03-08T13:35:55Z")

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Hello, I am a beginner in paraview, I am trying to convert a .vtk Data file (DATASET POLYDATA) to a 3D voxel-based image having a .raw or .tif format. So I need to voxelise the domain(sample of particles) and to saved …

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