# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=33

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

**Page:** 34

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## [CSV Writer from VTK](https://discourse.paraview.org/t/csv-writer-from-vtk/15371)

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**Author:** [@rmdmagalong](https://discourse.paraview.org/u/rmdmagalong)\
**Replies:** 2\
**Last updated:** [September 11, 2024, 6:40am UTC](https://discourse.paraview.org/t/csv-writer-from-vtk/15371 "2024-09-11T06:40:50Z")

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Hi everyone, I am trying to extract data from a VTK in the form of CSV. Now, I want it to have columns of X, Y, Z, and the Resistivity. I have used the CSV writer for this: Now, if I click on point data, only XYZ col…

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## [Cell merging in porous materials](https://discourse.paraview.org/t/cell-merging-in-porous-materials/15115)

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**Author:** [@Puraxx](https://discourse.paraview.org/u/Puraxx)\
**Replies:** 4\
**Last updated:** [September 10, 2024, 11:55am UTC](https://discourse.paraview.org/t/cell-merging-in-porous-materials/15115 "2024-09-10T11:55:53Z")

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Hi everyone ! So I wanna know if it’s possible to merge cell by using Paravie. What I mean is that I visualize pores in my material as shown in this picture And these pore sometimes touch each other and when this hap…

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## [CGNS and representing vectors from 2D datasets](https://discourse.paraview.org/t/cgns-and-representing-vectors-from-2d-datasets/15368)

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**Author:** [@Zoelle\_F\_Wong](https://discourse.paraview.org/u/Zoelle_F_Wong)\
**Replies:** 3\
**Last updated:** [September 10, 2024, 11:36am UTC](https://discourse.paraview.org/t/cgns-and-representing-vectors-from-2d-datasets/15368 "2024-09-10T11:36:58Z")

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Dear Paraview Universe, I have a .cgns file from a 2D dataset (x,y). I want to visualize the streamlines and tried using EvenlySpacedStreamlines2D. However, this option is grayed out and I am very certain that my domain…

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## [Color Map Classification Problem](https://discourse.paraview.org/t/color-map-classification-problem/15362)

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**Author:** [@rmdmagalong](https://discourse.paraview.org/u/rmdmagalong)\
**Replies:** 8\
**Last updated:** [September 10, 2024, 10:31am UTC](https://discourse.paraview.org/t/color-map-classification-problem/15362 "2024-09-10T10:31:41Z")

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I have been trying to figure out how to assign a specific range of numbers for each color but to no avail. What I want is for there would be a distinct color to represent each range/group of numbers. For example, all …

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## [Wrong colors if 2 scalars defined](https://discourse.paraview.org/t/wrong-colors-if-2-scalars-defined/15367)

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**Author:** [@amim](https://discourse.paraview.org/u/amim)\
**Replies:** 0\
**Last updated:** [September 9, 2024, 9:38pm UTC](https://discourse.paraview.org/t/wrong-colors-if-2-scalars-defined/15367 "2024-09-09T21:38:30Z")

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I have a simple vtk legacy file where I defined 2 SCALAR fields under CELL\_DATA. The first one is of “int” type and uses the default LOOKUP\_TABLE. The second one is of “float” type and uses my own LOOKUP\_TABLE. When I d…

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## [Rendering/Camera near/far clipping parameters](https://discourse.paraview.org/t/rendering-camera-near-far-clipping-parameters/4091)

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**Author:** [@wsherman](https://discourse.paraview.org/u/wsherman)\
**Replies:** 2\
**Last updated:** [September 9, 2024, 6:22pm UTC](https://discourse.paraview.org/t/rendering-camera-near-far-clipping-parameters/4091 "2024-09-09T18:22:47Z")

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Hello again, Another question regarding the animation I’m making. These two have to do with rendering and/or camera parameters. (Probably more to come.) First, I’d like to know if/how I can control the camera’s near/…

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## [Automatically Centering Camera on Data After Loading in Python Plugin](https://discourse.paraview.org/t/automatically-centering-camera-on-data-after-loading-in-python-plugin/15359)

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**Author:** [@SBl](https://discourse.paraview.org/u/SBl)\
**Replies:** 3\
**Last updated:** [September 9, 2024, 4:02pm UTC](https://discourse.paraview.org/t/automatically-centering-camera-on-data-after-loading-in-python-plugin/15359 "2024-09-09T16:02:06Z")

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I’ve recently updated how I load data in my ParaView using a Python plugin and encountered a camera behavior issue. Initially, the workflow was straightforward: The user selects the location of the data. Pressing “Appl…

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## [Assemble a mutiblock in parallel](https://discourse.paraview.org/t/assemble-a-mutiblock-in-parallel/15365)

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**Author:** [@alie89](https://discourse.paraview.org/u/alie89)\
**Replies:** 0\
**Last updated:** [September 9, 2024, 1:22pm UTC](https://discourse.paraview.org/t/assemble-a-mutiblock-in-parallel/15365 "2024-09-09T13:22:31Z")

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Hi ParaView crew, Is it possible to perform any kind of multiprocessing with a programmable filter? I am trying out to use a ProcessingPool from pathos: but I am getting into the pickling nightmare (e.g.): TypeError:…

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## [Cell and point labels in multiple colors](https://discourse.paraview.org/t/cell-and-point-labels-in-multiple-colors/15364)

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**Author:** [@amim](https://discourse.paraview.org/u/amim)\
**Replies:** 0\
**Last updated:** [September 9, 2024, 1:18pm UTC](https://discourse.paraview.org/t/cell-and-point-labels-in-multiple-colors/15364 "2024-09-09T13:18:00Z")

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I have multiple disjoint sets of points and cells created with Find Data. I would like to display each set labels in different colors at the same time. But no matter what I try, once I use, say, Select Cells with Polygon…

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## [Field evolution at different time intervals](https://discourse.paraview.org/t/field-evolution-at-different-time-intervals/15357)

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**Author:** [@lihaoyun521](https://discourse.paraview.org/u/lihaoyun521)\
**Replies:** 0\
**Last updated:** [September 9, 2024, 3:16am UTC](https://discourse.paraview.org/t/field-evolution-at-different-time-intervals/15357 "2024-09-09T03:16:54Z")

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Dear friends, How can I use ParaView to obtain the field evolution at different time intervals only through one figure and label them using different colors? Thanks a lot!

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## [Nek5000reader load error for Large dataset](https://discourse.paraview.org/t/nek5000reader-load-error-for-large-dataset/15351)

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**Author:** [@Lei\_Zhou](https://discourse.paraview.org/u/Lei_Zhou)\
**Replies:** 2\
**Last updated:** [September 6, 2024, 12:08pm UTC](https://discourse.paraview.org/t/nek5000reader-load-error-for-large-dataset/15351 "2024-09-06T12:08:18Z")

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Dear commnuity: I try to load a large dataset (around 50 GB) using Nek5000reader by mpi. I loaded it on my CentOS workstation, which has 256 GB memory and 40 CPUs. It threw such a problem 956: seekg error at read\_locat…

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## [Steps to calculate the Euler characteristics and Betti number](https://discourse.paraview.org/t/steps-to-calculate-the-euler-characteristics-and-betti-number/11777)

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**Author:** [@kokebdese](https://discourse.paraview.org/u/kokebdese)\
**Replies:** 36\
**Last updated:** [September 6, 2024, 7:26am UTC](https://discourse.paraview.org/t/steps-to-calculate-the-euler-characteristics-and-betti-number/11777 "2024-09-06T07:26:05Z")

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Hi all, Any one who help me to calculate the Euler characteristics and Betti number of a 3D object using TTK on ParaView? Thanks

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## [Sorting points](https://discourse.paraview.org/t/sorting-points/15254)

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**Author:** [@Mateus\_Facanha](https://discourse.paraview.org/u/Mateus_Facanha)\
**Replies:** 2\
**Last updated:** [September 5, 2024, 3:40pm UTC](https://discourse.paraview.org/t/sorting-points/15254 "2024-09-05T15:40:48Z")

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Hello! I´m trying to order the points to insert into a polyline, but when i extract the points they go out of order of my selection. So the polyline gets the wrong shape. How can i solve this problem? The images …

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## [Paraview Compilation Errors with Catalyst enabled \[Paraview 5.13.0-RC2\]](https://discourse.paraview.org/t/paraview-compilation-errors-with-catalyst-enabled-paraview-5-13-0-rc2/15345)

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**Author:** [@gsabhishek](https://discourse.paraview.org/u/gsabhishek)\
**Replies:** 4\
**Last updated:** [September 5, 2024, 11:13am UTC](https://discourse.paraview.org/t/paraview-compilation-errors-with-catalyst-enabled-paraview-5-13-0-rc2/15345 "2024-09-05T11:13:19Z")

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Hi, I am having errors compiling ParaView with the -DPARAVIEW\_ENABLE\_CATALYST=ON . I am compiling with gcc 11.2.0. Without catalyst it builds fine. With catalyst I get the following error. Any Ideas? paraview/master/…

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## [Issue with python plugin when loading a single time step](https://discourse.paraview.org/t/issue-with-python-plugin-when-loading-a-single-time-step/15338)

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**Author:** [@SBl](https://discourse.paraview.org/u/SBl)\
**Replies:** 6\
**Last updated:** [September 4, 2024, 7:43am UTC](https://discourse.paraview.org/t/issue-with-python-plugin-when-loading-a-single-time-step/15338 "2024-09-04T07:43:45Z")

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I am writing a python plugin in which I need to load time-dependent data. I noticed an issue when I pass a time step list of size 1. Instead of showing just a single time step, Paraview shows the list with the following …

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## [Error whenever loading from state file](https://discourse.paraview.org/t/error-whenever-loading-from-state-file/15319)

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**Author:** [@deanwormer](https://discourse.paraview.org/u/deanwormer)\
**Replies:** 12\
**Last updated:** [September 3, 2024, 5:44pm UTC](https://discourse.paraview.org/t/error-whenever-loading-from-state-file/15319 "2024-09-03T17:44:15Z")

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Hi everyone. I’m getting the following error loading on Paraview\_5.13.0-RC1 on OSX 14.6. Then Paraview hangs and I cannot proceed. When I load from state when I have already opened a file, it loads, but I receive the …

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## [Progress bar not progressing 5.10.0](https://discourse.paraview.org/t/progress-bar-not-progressing-5-10-0/15343)

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**Author:** [@Gregorio\_Biagi](https://discourse.paraview.org/u/Gregorio_Biagi)\
**Replies:** 1\
**Last updated:** [September 3, 2024, 3:39pm UTC](https://discourse.paraview.org/t/progress-bar-not-progressing-5-10-0/15343 "2024-09-03T15:39:13Z")

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Hi all, I just installed openfoam12 using Ubuntu 22.04 and when I tried to run the example on the openfoam website the “foamRun” command worked perfect and it ran the simulation. However when I tried to open paraview to…

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## [Seed type:point cloud not enough parameters in stream tracer](https://discourse.paraview.org/t/seed-type-point-cloud-not-enough-parameters-in-stream-tracer/15302)

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**Author:** [@zdc](https://discourse.paraview.org/u/zdc)\
**Replies:** 4\
**Last updated:** [September 3, 2024, 3:17pm UTC](https://discourse.paraview.org/t/seed-type-point-cloud-not-enough-parameters-in-stream-tracer/15302 "2024-09-03T15:17:15Z")

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I am using Windows 11 and using meteorological netcdf data to draw a 3D flow field. I am using the stream tracer filter and the seed type is point cloud. In addition to longitude, latitude and altitude, there is also a r…

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## [Wall\_shear\_stress on Field Files](https://discourse.paraview.org/t/wall-shear-stress-on-field-files/15340)

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**Author:** [@Pranay\_006](https://discourse.paraview.org/u/Pranay_006)\
**Replies:** 0\
**Last updated:** [September 2, 2024, 8:18pm UTC](https://discourse.paraview.org/t/wall-shear-stress-on-field-files/15340 "2024-09-02T20:18:10Z")

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I am trying to extract wall shear stress or gradient dU/dy across the airfoil profile using gradient and methods proposed in Manipulation of field files - ParaView Support - ParaView and Calculation of Drag, Wall shear s…

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## [How to output variables visible in plot global variables to a file](https://discourse.paraview.org/t/how-to-output-variables-visible-in-plot-global-variables-to-a-file/15331)

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**Author:** [@jackeggemeyer](https://discourse.paraview.org/u/jackeggemeyer)\
**Replies:** 2\
**Last updated:** [September 2, 2024, 6:01pm UTC](https://discourse.paraview.org/t/how-to-output-variables-visible-in-plot-global-variables-to-a-file/15331 "2024-09-02T18:01:08Z")

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I am wondering how you output global variables to an output file, I can only see field, point, and block data. When I plot my global variables over time, they all show up perfectly. However, if I output the field data is…

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## [mpiexec and cluster](https://discourse.paraview.org/t/mpiexec-and-cluster/15339)

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**Author:** [@Nicholas\_Yue](https://discourse.paraview.org/u/Nicholas_Yue)\
**Replies:** 1\
**Last updated:** [September 2, 2024, 3:13pm UTC](https://discourse.paraview.org/t/mpiexec-and-cluster/15339 "2024-09-02T15:13:06Z")

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I am setting up a test cluster (vagrant+virtualbox) to learn more about mpiexec and pvserver The cluster on virtualbox has the following nodes head node-1 node-2 The head node is where I can login to run something li…

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## [vtkOutputWindow](https://discourse.paraview.org/t/vtkoutputwindow/15336)

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**Author:** [@Ali\_Rahnama](https://discourse.paraview.org/u/Ali_Rahnama)\
**Replies:** 0\
**Last updated:** [September 2, 2024, 11:38am UTC](https://discourse.paraview.org/t/vtkoutputwindow/15336 "2024-09-02T11:38:39Z")

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I’m using a python code that hides paraview error by using the following: no\_op\_output\_window = NoOpOutputWindow() vtk.vtkOutputWindow.SetInstance(no\_op\_output\_window) in which : Define a no-op vtkOutputWindow class c…

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## [Using a Skybox from Python script](https://discourse.paraview.org/t/using-a-skybox-from-python-script/15328)

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**Author:** [@jfavre](https://discourse.paraview.org/u/jfavre)\
**Replies:** 6\
**Last updated:** [September 2, 2024, 7:46am UTC](https://discourse.paraview.org/t/using-a-skybox-from-python-script/15328 "2024-09-02T07:46:13Z")

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I am not able to re-load a simple Python script with a Skybox background (ParaView 5.13). The following code always gives error, while it works fine loading the texture interactively renderView1 = GetRenderView() disk1…

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## [Can I visualize the strains from an LS-Dyna analysis in Paraview?](https://discourse.paraview.org/t/can-i-visualize-the-strains-from-an-ls-dyna-analysis-in-paraview/15326)

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**Author:** [@vtac](https://discourse.paraview.org/u/vtac)\
**Replies:** 1\
**Last updated:** [August 31, 2024, 1:59am UTC](https://discourse.paraview.org/t/can-i-visualize-the-strains-from-an-ls-dyna-analysis-in-paraview/15326 "2024-08-31T01:59:02Z")

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I am new both to Paraview and LS-Dyna, so I apologize if this is a stupid question. I can open my d3plot files in Paraview without problems and visualize some quantities such as Stress. But I can’t see strains. On the ot…

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## [Make CSV reader automatically use column 1 as default X Axis rather than using index for X Axis](https://discourse.paraview.org/t/make-csv-reader-automatically-use-column-1-as-default-x-axis-rather-than-using-index-for-x-axis/15330)

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**Author:** [@jman87](https://discourse.paraview.org/u/jman87)\
**Replies:** 3\
**Last updated:** [August 30, 2024, 2:12pm UTC](https://discourse.paraview.org/t/make-csv-reader-automatically-use-column-1-as-default-x-axis-rather-than-using-index-for-x-axis/15330 "2024-08-30T14:12:01Z")

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I have a finite element program that writes out the time-histories of user-defined rigid wall forces to a CSV file. The first line of the CSV file contains the column labels, and for a file with 7 rigid wall definitions,…

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## [Calculation of Drag, Wall shear stress, Lift](https://discourse.paraview.org/t/calculation-of-drag-wall-shear-stress-lift/15329)

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**Author:** [@Pranay\_006](https://discourse.paraview.org/u/Pranay_006)\
**Replies:** 4\
**Last updated:** [August 30, 2024, 1:20pm UTC](https://discourse.paraview.org/t/calculation-of-drag-wall-shear-stress-lift/15329 "2024-08-30T13:20:04Z")

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Hello I have a simulation around the airfoil the field files generated as .f00000 and a binder file .nek5000. I am trying to see if it is possible to extract surface of the airfoil as shown in the video below or calcula…

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## [How to show the index of points or element？](https://discourse.paraview.org/t/how-to-show-the-index-of-points-or-element/15321)

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**Author:** [@LuoLuoLuo](https://discourse.paraview.org/u/LuoLuoLuo)\
**Replies:** 2\
**Last updated:** [August 30, 2024, 5:02am UTC](https://discourse.paraview.org/t/how-to-show-the-index-of-points-or-element/15321 "2024-08-30T05:02:37Z")

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Hello, I am trying to visulization the .vtk file getting from pygmsh and to check the mesh quality, so i’d like to show the index of points on the plot, but i can only find the points with no index. I appreciate your h…

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## [Average in one direction to get a 2D field out of 3D data](https://discourse.paraview.org/t/average-in-one-direction-to-get-a-2d-field-out-of-3d-data/15305)

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**Author:** [@Gitzzly](https://discourse.paraview.org/u/Gitzzly)\
**Replies:** 0\
**Last updated:** [August 26, 2024, 2:45pm UTC](https://discourse.paraview.org/t/average-in-one-direction-to-get-a-2d-field-out-of-3d-data/15305 "2024-08-26T14:45:33Z")

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Hello everyone, My question seems to be a very basic problem, but unfortunately I couldn’t find any solution in the forum, so I’m starting this new thread. I have a 3D fluid simulation, say a pipe flow, and just want t…

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## [Raytracing of pathline segments (created with TemporalParticlesToPathlines)](https://discourse.paraview.org/t/raytracing-of-pathline-segments-created-with-temporalparticlestopathlines/15314)

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**Author:** [@Michael\_Boettinger](https://discourse.paraview.org/u/Michael_Boettinger)\
**Replies:** 3\
**Last updated:** [August 28, 2024, 11:27am UTC](https://discourse.paraview.org/t/raytracing-of-pathline-segments-created-with-temporalparticlestopathlines/15314 "2024-08-28T11:27:25Z")

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Hi, I successfully created an animation of time dependent data using ParticleTracer and TemporalParticlesToPathlines in order to visualize only the most recent 5 time steps of each trajectory. An example for results of …

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## [The romantic field generated by StreamTracerwithCustomsource is layered, discontinuous](https://discourse.paraview.org/t/the-romantic-field-generated-by-streamtracerwithcustomsource-is-layered-discontinuous/15301)

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**Author:** [@zdc](https://discourse.paraview.org/u/zdc)\
**Replies:** 3\
**Last updated:** [August 28, 2024, 11:21am UTC](https://discourse.paraview.org/t/the-romantic-field-generated-by-streamtracerwithcustomsource-is-layered-discontinuous/15301 "2024-08-28T11:21:15Z")

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Hello, when I use StreamTracerwithCustomsource in the Windows11 system, the seeds of the romantic field are generated through the program. The seed point is vertically distributed between the pressure layer-1100 to -100,…

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