# \#vtk

**URL:** https://discourse.paraview.org/tag/vtk/12.md

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

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## [ParaView 6.2.0 complains about not having any points for plot over line on an MPI distributed dataset](https://discourse.paraview.org/t/paraview-6-2-0-complains-about-not-having-any-points-for-plot-over-line-on-an-mpi-distributed-dataset/17755)

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**Author:** [@Alexandre\_Minot](https://discourse.paraview.org/u/Alexandre_Minot)\
**Replies:** 8\
**Last updated:** [October 7, 2026, 2:30pm UTC](https://discourse.paraview.org/t/paraview-6-2-0-complains-about-not-having-any-points-for-plot-over-line-on-an-mpi-distributed-dataset/17755 "2026-10-07T14:30:38Z")

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Hello, I am getting these warning since I updated from ParaView 6.2.0 RC1 to 6.2.0: ( 1.403s) \[pvbatch.0 \] vtkPolyDataReader.cxx:267 WARN| vtkPolyDataReader (0x7cd01787c980): No points read! ( 1.403s) \[pvb…

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## [Plot On Sorted Lines segfaults in ParaView 6.2.0 when line segments are out of order](https://discourse.paraview.org/t/plot-on-sorted-lines-segfaults-in-paraview-6-2-0-when-line-segments-are-out-of-order/17759)

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**Author:** [@T-Wainwright](https://discourse.paraview.org/u/T-Wainwright)\
**Replies:** 1\
**Last updated:** [October 6, 2026, 4:38pm UTC](https://discourse.paraview.org/t/plot-on-sorted-lines-segfaults-in-paraview-6-2-0-when-line-segments-are-out-of-order/17759 "2026-10-06T16:38:23Z")

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Since moving to 6.2.0, Plot On Sorted Lines crashes on our slice output. It happens whenever the input segments aren’t listed in the order they connect. The script below crashes on 6.2.0 and prints 1 block(s), 5 points o…

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## [CleanToGrid equivalent in vtk](https://discourse.paraview.org/t/cleantogrid-equivalent-in-vtk/17736)

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**Author:** [@MiguelAngelAGUIRRE](https://discourse.paraview.org/u/MiguelAngelAGUIRRE)\
**Replies:** 1\
**Last updated:** [September 22, 2026, 7:11am UTC](https://discourse.paraview.org/t/cleantogrid-equivalent-in-vtk/17736 "2026-09-22T07:11:53Z")

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Hello, I’m making a Python Programmable filter with several vtk operations concatenated. One of this operations requires applying CleanToGrid to a vtk object (It can be either vtkMultiBlockDataSet or vtkUnstructuredGrid…

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## [Cell Data to Point Data question](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722)

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**Author:** [@Joao\_Pedro\_Perdigao](https://discourse.paraview.org/u/Joao_Pedro_Perdigao)\
**Replies:** 6\
**Last updated:** [September 18, 2026, 8:08am UTC](https://discourse.paraview.org/t/cell-data-to-point-data-question/17722 "2026-09-18T08:08:02Z")

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Hello, I’m applying a “Cell Data to Point Data” filter to my wind tunnel data and when checking the Ranges of the data arrays I realized that the ranges (maximum and minimum values) of the Point Data differ quite a bit …

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## [Mismatch of points/tuples between vtkmCleanGrid and its VTK-numpy-wrapper](https://discourse.paraview.org/t/mismatch-of-points-tuples-between-vtkmcleangrid-and-its-vtk-numpy-wrapper/17698)

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**Author:** [@Bodacious](https://discourse.paraview.org/u/Bodacious)\
**Replies:** 8\
**Last updated:** [August 27, 2026, 6:21pm UTC](https://discourse.paraview.org/t/mismatch-of-points-tuples-between-vtkmcleangrid-and-its-vtk-numpy-wrapper/17698 "2026-08-27T18:21:49Z")

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Hello, I have a vtkUnstructuredGrid dataset that I filter with a vtkmCleanGrid VTK object in a programmable filter, whose objective is to perform the divergence operator on the VTK-numpy wrapped output of the vtkmCleanGr…

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## [Create slice from irregular line](https://discourse.paraview.org/t/create-slice-from-irregular-line/17685)

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**Author:** [@Vinicius](https://discourse.paraview.org/u/Vinicius)\
**Replies:** 2\
**Last updated:** [August 17, 2026, 2:12pm UTC](https://discourse.paraview.org/t/create-slice-from-irregular-line/17685 "2026-08-17T14:12:13Z")

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Hi all, I am using ParaView version 5.12.0 for Windows. I would like to know if there is a way to create a slice along an irregular line within a structured grid and display it in an unwrapped format. I have a structur…

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## [plot over line vtp files](https://discourse.paraview.org/t/plot-over-line-vtp-files/17679)

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**Author:** [@Mersad\_j](https://discourse.paraview.org/u/Mersad_j)\
**Replies:** 3\
**Last updated:** [August 14, 2026, 7:25am UTC](https://discourse.paraview.org/t/plot-over-line-vtp-files/17679 "2026-08-14T07:25:27Z")

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validator.vtp (2.6 MB) hi i have a file in vtp format. im new to paraview and i have some problems. i share here. when i use plot over line or any types of plot filters i dont know how to set my x and y axis data. for e…

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## [Getting "Byte order could not be determined" error when opening up Ensight Case Gold files written from ANSYS Fluent 2021R2](https://discourse.paraview.org/t/getting-byte-order-could-not-be-determined-error-when-opening-up-ensight-case-gold-files-written-from-ansys-fluent-2021r2/12250)

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**Author:** [@austinbenny](https://discourse.paraview.org/u/austinbenny)\
**Replies:** 18\
**Last updated:** [July 29, 2026, 8:50am UTC](https://discourse.paraview.org/t/getting-byte-order-could-not-be-determined-error-when-opening-up-ensight-case-gold-files-written-from-ansys-fluent-2021r2/12250 "2026-07-29T08:50:07Z")

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My workflow is to have ANSYS Fluent 2021R2 write Ensight Case Gold files that i then post-process in paraview. I could successfully do this before with a different simulation (the ANSYS Fluent version and paraview versio…

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## [Advanced post-processing externally for volume rendering data](https://discourse.paraview.org/t/advanced-post-processing-externally-for-volume-rendering-data/5392)

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**Author:** [@Partth\_Laad](https://discourse.paraview.org/u/Partth_Laad)\
**Replies:** 4\
**Last updated:** [July 22, 2026, 3:23pm UTC](https://discourse.paraview.org/t/advanced-post-processing-externally-for-volume-rendering-data/5392 "2026-07-22T15:23:44Z")

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Hi all, I had a question regarding post-processing of volume rendering data and its export to other other utilities. While I find ParaView to provide great post-processing, the added surface/texture improvement is neces…

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## [paraview.simple.reader to VTK object?](https://discourse.paraview.org/t/paraview-simple-reader-to-vtk-object/3496)

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**Author:** [@whophil](https://discourse.paraview.org/u/whophil)\
**Replies:** 3\
**Last updated:** [July 15, 2026, 3:23pm UTC](https://discourse.paraview.org/t/paraview-simple-reader-to-vtk-object/3496 "2026-07-15T15:23:58Z")

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I am reading a binary TecPlot file in Python. I tried to use vtk.vtkTecplotReader, but this crashes. Instead, I have shifted my approach to use paraview.simple.VisItTecplotBinaryReader. Ultimately I would like to use VT…

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## [Strange display representation of VTK\_POLYHEDRON cells](https://discourse.paraview.org/t/strange-display-representation-of-vtk-polyhedron-cells/14612)

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**Author:** [@Ieeshka](https://discourse.paraview.org/u/Ieeshka)\
**Replies:** 4\
**Last updated:** [June 24, 2026, 2:47pm UTC](https://discourse.paraview.org/t/strange-display-representation-of-vtk-polyhedron-cells/14612 "2026-06-24T14:47:28Z")

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Hello everybody! I am a newbie in ParaView and I would appreciate some explanation of the cell visualization problem I observe (VTK\_POLYHEDRON). I have generated VTU file with 3D mesh of polyhedrons using my own python …

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## [VTK "Structured Points" Procedure](https://discourse.paraview.org/t/vtk-structured-points-procedure/5834)

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**Author:** [@guis1901](https://discourse.paraview.org/u/guis1901)\
**Replies:** 10\
**Last updated:** [June 16, 2026, 10:02am UTC](https://discourse.paraview.org/t/vtk-structured-points-procedure/5834 "2026-06-16T10:02:48Z")

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Hello, I am completely new to this so please feel free to refer me to an existing response/post. I have, however, searched the forum and not found what I am looking to do… I am importing data from a CSV in a X-Y-Z-Sig1…

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## [Version 6.1.1 no longer reads my EnSight case files](https://discourse.paraview.org/t/version-6-1-1-no-longer-reads-my-ensight-case-files/17583)

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**Author:** [@elynch](https://discourse.paraview.org/u/elynch)\
**Replies:** 2\
**Last updated:** [May 28, 2026, 1:37pm UTC](https://discourse.paraview.org/t/version-6-1-1-no-longer-reads-my-ensight-case-files/17583 "2026-05-28T13:37:29Z")

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ensight\_case\_issue.zip (700.2 KB) I’ve attached a dataset in EnSight Gold format. There are three versions of the case file. original.case is the format we have been writing for years and which ParaView has been able …

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## [How to generate a short video in paraview](https://discourse.paraview.org/t/how-to-generate-a-short-video-in-paraview/17572)

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**Author:** [@Monirul25](https://discourse.paraview.org/u/Monirul25)\
**Replies:** 1\
**Last updated:** [May 19, 2026, 8:40pm UTC](https://discourse.paraview.org/t/how-to-generate-a-short-video-in-paraview/17572 "2026-05-19T20:40:38Z")

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Respected Experts, I am very new to using ParaView, and I want to learn how to create simulation videos step by step. I would like to understand the basics, such as loading simulation data, changing colors, creating an…

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## [Paraview does not open ElmerGUI vtu result file](https://discourse.paraview.org/t/paraview-does-not-open-elmergui-vtu-result-file/17556)

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**Author:** [@Roland01](https://discourse.paraview.org/u/Roland01)\
**Replies:** 2\
**Last updated:** [May 11, 2026, 10:22am UTC](https://discourse.paraview.org/t/paraview-does-not-open-elmergui-vtu-result-file/17556 "2026-05-11T10:22:14Z")

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Hi, after installing the GIT official Elmer compiled last version and Paraview 5.12 on my Kubuntu 24.04 LTS os, everything went ok except that when opening the vtu results file with Paraview it gives an error message, so…

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## [Trouble Seeing Geometries in vtk file](https://discourse.paraview.org/t/trouble-seeing-geometries-in-vtk-file/17531)

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**Author:** [@ErayBaykal](https://discourse.paraview.org/u/ErayBaykal)\
**Replies:** 4\
**Last updated:** [April 23, 2026, 4:09pm UTC](https://discourse.paraview.org/t/trouble-seeing-geometries-in-vtk-file/17531 "2026-04-23T16:09:27Z")

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I’ve tried uploading vtk files from different sources and they all only seem to display the bounding box and no materials within. I’ve tried changing the coloring menu to the material but it didn’t change anything. Here’…

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## [Cannot reset "Open Data With" default reader for .vtu files on Kubuntu](https://discourse.paraview.org/t/cannot-reset-open-data-with-default-reader-for-vtu-files-on-kubuntu/17496)

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**Author:** [@Daniel\_Marco](https://discourse.paraview.org/u/Daniel_Marco)\
**Replies:** 1\
**Last updated:** [March 30, 2026, 11:33am UTC](https://discourse.paraview.org/t/cannot-reset-open-data-with-default-reader-for-vtu-files-on-kubuntu/17496 "2026-03-30T11:33:24Z")

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I am an aerospace student using SU2 for wing simulations. I accidentally checked the “Set reader as default” box for .vtu files, selecting the OpenFOAM reader. Now, ParaView skips the “Open Data With” selection dialog an…

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## [Tips to visualize a vector field with an overlaid molecule](https://discourse.paraview.org/t/tips-to-visualize-a-vector-field-with-an-overlaid-molecule/17493)

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**Author:** [@jzwanzig](https://discourse.paraview.org/u/jzwanzig)\
**Replies:** 11\
**Last updated:** [March 26, 2026, 5:00pm UTC](https://discourse.paraview.org/t/tips-to-visualize-a-vector-field-with-an-overlaid-molecule/17493 "2026-03-26T17:00:44Z")

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Hello, perhaps this question is better suited to a vtk forum, but I thought I’d start here: I generate vector field data with an ab initio code, and I have been able to convert it to a vtkStrucuturedGrid and visualize it…

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## [Out of memory issue with the programmable filter.](https://discourse.paraview.org/t/out-of-memory-issue-with-the-programmable-filter/17487)

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**Author:** [@XiangyuLong](https://discourse.paraview.org/u/XiangyuLong)\
**Replies:** 3\
**Last updated:** [March 20, 2026, 5:09pm UTC](https://discourse.paraview.org/t/out-of-memory-issue-with-the-programmable-filter/17487 "2026-03-20T17:09:14Z")

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Hi experts, I’m trying to add a programmable filter to a vtk file. The vtk file is around 60mb and the text file for the programmable filter is around 20mb. Those files could be found here: Dropbox However after I load…

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## [zooming problem](https://discourse.paraview.org/t/zooming-problem/17455)

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**Author:** [@Alice\_Williams](https://discourse.paraview.org/u/Alice_Williams)\
**Replies:** 8\
**Last updated:** [March 8, 2026, 1:10pm UTC](https://discourse.paraview.org/t/zooming-problem/17455 "2026-03-08T13:10:08Z")

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Dear All, When I try to zoom on the image it turns out to be really blurry. I only need small part of my image to publish. Do you have any recommendations? It turns like the one I attached.

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## [Properly viewing triclinic boxes that have STRUCTURED\_POINTS dataset](https://discourse.paraview.org/t/properly-viewing-triclinic-boxes-that-have-structured-points-dataset/17434)

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**Author:** [@akball](https://discourse.paraview.org/u/akball)\
**Replies:** 7\
**Last updated:** [February 12, 2026, 4:19pm UTC](https://discourse.paraview.org/t/properly-viewing-triclinic-boxes-that-have-structured-points-dataset/17434 "2026-02-12T16:19:05Z")

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Hi everyone, I am new to ParaView, so please feel free to refer to any related posts or responses. I am having trouble visualizing VTK files containing volumetric data for triclinic cells. During visualization, the tricl…

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## [Visualising thickness of plate/shell elements](https://discourse.paraview.org/t/visualising-thickness-of-plate-shell-elements/17413)

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**Author:** [@SFox](https://discourse.paraview.org/u/SFox)\
**Replies:** 3\
**Last updated:** [January 29, 2026, 8:55am UTC](https://discourse.paraview.org/t/visualising-thickness-of-plate-shell-elements/17413 "2026-01-29T08:55:37Z")

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I am interested in visualising the thickness of 2D shell elements. I have a toy problem of a collision between a cantilever supported tube, and a rigid sphere. I would like to add some thickness to the shell elements …

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## [Help visualize the Q-value](https://discourse.paraview.org/t/help-visualize-the-q-value/17397)

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**Author:** [@R\_Mur](https://discourse.paraview.org/u/R_Mur)\
**Replies:** 10\
**Last updated:** [January 16, 2026, 4:35pm UTC](https://discourse.paraview.org/t/help-visualize-the-q-value/17397 "2026-01-16T16:35:00Z")

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I’m trying to visualize Q-values using C++. Currently, I can’t get the intended outline to appear as shown in the file below. Could someone please tell me why? As it stands, it’s currently a cube. I want to display a …

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## [Paraview shuts down while running a OpenFoam tutorial case with error: "non-digit character" in powk file](https://discourse.paraview.org/t/paraview-shuts-down-while-running-a-openfoam-tutorial-case-with-error-non-digit-character-in-powk-file/5038)

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**Author:** [@YULING](https://discourse.paraview.org/u/YULING)\
**Replies:** 8\
**Last updated:** [January 6, 2026, 1:01pm UTC](https://discourse.paraview.org/t/paraview-shuts-down-while-running-a-openfoam-tutorial-case-with-error-non-digit-character-in-powk-file/5038 "2026-01-06T13:01:13Z")

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Hi there, I have a problem while running paraview, the error came as: ERROR: In /home/yuling/OpenFOAM/ThirdParty-v2006/ParaView-v5.6.3/VTK/IO/Geometry/vtkOpenFOAMReader.cxx, line 7495 vtkOpenFOAMReaderPrivate (0x55b41…

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## [Errors in resampling unstructured data set to structured grids using .vtu files](https://discourse.paraview.org/t/errors-in-resampling-unstructured-data-set-to-structured-grids-using-vtu-files/17364)

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**Author:** [@aadl\_uk](https://discourse.paraview.org/u/aadl_uk)\
**Replies:** 5\
**Last updated:** [December 16, 2025, 9:00am UTC](https://discourse.paraview.org/t/errors-in-resampling-unstructured-data-set-to-structured-grids-using-vtu-files/17364 "2025-12-16T09:00:27Z")

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Hello, I am using Paraview to post-process unstructured CFD data from PyFR. I would like to map the solution in an unstructured mesh (.vtu) onto another unstructured grid (.cgns) using the ResampleWithDataset filter. A…

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## [Paraview 6.0.1 crashed when applying the "Merge Blocks" filter.](https://discourse.paraview.org/t/paraview-6-0-1-crashed-when-applying-the-merge-blocks-filter/17369)

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**Author:** [@m41m41\_Ann](https://discourse.paraview.org/u/m41m41_Ann)\
**Replies:** 2\
**Last updated:** [December 12, 2025, 3:57pm UTC](https://discourse.paraview.org/t/paraview-6-0-1-crashed-when-applying-the-merge-blocks-filter/17369 "2025-12-12T15:57:15Z")

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Applying the “Merge Blocks” filter to the file causes a crash. Could there be a problem with the data in the test file? Operating steps: Open Paraview, drag and drop this CGNS file into Paraview, apply, add the ‘Merge B…

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## [Wireframe coloring issue: shared boundary between two regions shows mixed colors](https://discourse.paraview.org/t/wireframe-coloring-issue-shared-boundary-between-two-regions-shows-mixed-colors/17362)

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**Author:** [@jialugao](https://discourse.paraview.org/u/jialugao)\
**Replies:** 10\
**Last updated:** [December 12, 2025, 2:45am UTC](https://discourse.paraview.org/t/wireframe-coloring-issue-shared-boundary-between-two-regions-shows-mixed-colors/17362 "2025-12-12T02:45:31Z")

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Hi everyone, When visualizing my mesh in Wireframe mode, I color the mesh using a cell-based tag array (for example, region IDs 15 and 16). However, on the shared boundary between the two regions, the edges appear partl…

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## [Fail in applying materials to a paraview object - vtkOSPRayMaterial error](https://discourse.paraview.org/t/fail-in-applying-materials-to-a-paraview-object-vtkospraymaterial-error/16079)

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**Author:** [@aero.py](https://discourse.paraview.org/u/aero.py)\
**Replies:** 3\
**Last updated:** [December 9, 2025, 10:43am UTC](https://discourse.paraview.org/t/fail-in-applying-materials-to-a-paraview-object-vtkospraymaterial-error/16079 "2025-12-09T10:43:23Z")

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Hi, I’m trying to apply material properties to active objects in a paraview session through python. The premise is that if I execute the steps manually I can get the materials correctly in place. If I emulate the python…

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## [git lfs throws "expected OID error"](https://discourse.paraview.org/t/git-lfs-throws-expected-oid-error/17305)

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**Author:** [@JIERSHAO](https://discourse.paraview.org/u/JIERSHAO)\
**Replies:** 16\
**Last updated:** [November 14, 2025, 1:54pm UTC](https://discourse.paraview.org/t/git-lfs-throws-expected-oid-error/17305 "2025-11-14T13:54:57Z")

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Hello, Everyone! I using Microsoft Windows to building ParaView in version5.13.0 I am getting the following error when trying to clone the repository Error downloading object: data/README.md (b30a14a): Smudge error: E…

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## [Fail to load files in a group](https://discourse.paraview.org/t/fail-to-load-files-in-a-group/15861)

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**Author:** [@mingwang](https://discourse.paraview.org/u/mingwang)\
**Replies:** 17\
**Last updated:** [November 9, 2025, 8:34pm UTC](https://discourse.paraview.org/t/fail-to-load-files-in-a-group/15861 "2025-11-09T20:34:59Z")

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I am trying to load a temporal series of files as a group. While these files appear grouped in the Open File dialog (the first image below), after clicking OK to load them, they are displayed separately in the Pipeline B…

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