# Development

**URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=1

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

**Page:** 2

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## [Handling overlapping node labels and dense graph visualization in ParaView/pvpython](https://discourse.paraview.org/t/handling-overlapping-node-labels-and-dense-graph-visualization-in-paraview-pvpython/17562)

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**Author:** [@Sahith](https://discourse.paraview.org/u/Sahith)\
**Replies:** 2\
**Last updated:** [May 12, 2026, 11:07am UTC](https://discourse.paraview.org/t/handling-overlapping-node-labels-and-dense-graph-visualization-in-paraview-pvpython/17562 "2026-05-12T11:07:50Z")

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Hello, I am exploring graph/extremum graph visualization workflows in ParaView (5.13.3) and testing node labeling for dense topology visualizations. So far I tested: Find Data Extract Selection Point Labels / …

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## [Deprecating MultiBlock datasets](https://discourse.paraview.org/t/deprecating-multiblock-datasets/4950)

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**Author:** [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)\
**Replies:** 52\
**Last updated:** [May 11, 2026, 1:35pm UTC](https://discourse.paraview.org/t/deprecating-multiblock-datasets/4950 "2026-05-11T13:35:49Z")

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Multiblock Datasets (vtkMultiBlockDataSet) have been used in ParaView for representing a collection of datasets. Besides being a container for multiple datasets, called blocks, it also lets us define relationships betwee…

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## [CMake description of ParaView 6.x dose not match the actual requirements about Python.](https://discourse.paraview.org/t/cmake-description-of-paraview-6-x-dose-not-match-the-actual-requirements-about-python/17552)

<div class="topic-metadata">

**Author:** [@earth2001y](https://discourse.paraview.org/u/earth2001y)\
**Replies:** 6\
**Last updated:** [May 8, 2026, 12:55am UTC](https://discourse.paraview.org/t/cmake-description-of-paraview-6-x-dose-not-match-the-actual-requirements-about-python/17552 "2026-05-08T00:55:17Z")

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pvpython of ParaView 6.1 build from source code on Rocky Linux 8 doesn’t work import paraview.simple with following message. \>\>\> import paraview.simple Traceback (most recent call last): File "\<stdin\>", line 1, in \<mo…

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## [Why do certain packages need to be installed when using the ParaView binary package ?](https://discourse.paraview.org/t/why-do-certain-packages-need-to-be-installed-when-using-the-paraview-binary-package/16719)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 4\
**Last updated:** [May 5, 2026, 9:02am UTC](https://discourse.paraview.org/t/why-do-certain-packages-need-to-be-installed-when-using-the-paraview-binary-package/16719 "2026-05-05T09:02:04Z")

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I sometimes get that questions from other developpers and users as well. So I tried to give a comprehensive answers. Please let me know if you spot anything wrong. I focused a bit more on xcb for reasons. As stated in …

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## [Request for Review: CPEX-0050 - Solution Field Continuity Metadata in CGNS](https://discourse.paraview.org/t/request-for-review-cpex-0050-solution-field-continuity-metadata-in-cgns/17532)

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**Author:** [@brtnfld](https://discourse.paraview.org/u/brtnfld)\
**Replies:** 0\
**Last updated:** [April 23, 2026, 2:10pm UTC](https://discourse.paraview.org/t/request-for-review-cpex-0050-solution-field-continuity-metadata-in-cgns/17532 "2026-04-23T14:10:30Z")

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Hello, This concerns the recently proposed CGNS CPEX 50, which introduces solution-field continuity metadata into the CGNS standard. This extension allows CGNS to indicate whether a solution field is continuous or disco…

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## [Tag 6.1.0 release for kitware/paraview\_org-plugin-devel](https://discourse.paraview.org/t/tag-6-1-0-release-for-kitware-paraview-org-plugin-devel/17523)

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**Author:** [@sherin.sugathan](https://discourse.paraview.org/u/sherin.sugathan)\
**Replies:** 5\
**Last updated:** [April 16, 2026, 12:29pm UTC](https://discourse.paraview.org/t/tag-6-1-0-release-for-kitware-paraview-org-plugin-devel/17523 "2026-04-16T12:29:45Z")

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Since the release of PV 6.1.0, I have been checking https://hub.docker.com/r/kitware/paraview\_org-plugin-devel/tags , but I dont see a 6.1.0 tag getting released yet. I was under the impression that the docker image woul…

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## [Superbuild problem with MSVC versions](https://discourse.paraview.org/t/superbuild-problem-with-msvc-versions/17481)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 19\
**Last updated:** [March 27, 2026, 6:24pm UTC](https://discourse.paraview.org/t/superbuild-problem-with-msvc-versions/17481 "2026-03-27T18:24:01Z")

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Trying to run a “superbuild” that is derived from the “superbuild” of PV 5.15.3, generating a Windows installer for a PV derived application (same version), on Windows 11. There is a need to include a precompiled binary…

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## [Volume rendering on log scale switches to grayscale map](https://discourse.paraview.org/t/volume-rendering-on-log-scale-switches-to-grayscale-map/17491)

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**Author:** [@eisenlohr](https://discourse.paraview.org/u/eisenlohr)\
**Replies:** 5\
**Last updated:** [March 25, 2026, 8:16am UTC](https://discourse.paraview.org/t/volume-rendering-on-log-scale-switches-to-grayscale-map/17491 "2026-03-25T08:16:07Z")

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PV 6.1 RC1 inadvertently switches the colormap to grayscale (x-ray) when enabling logarithmic scaling. I use the attached example, switch to volume rendering, set the data limits to 0.2–5, then toggle between linear and …

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## [GitLab has changed "Issues" to "Work Items"](https://discourse.paraview.org/t/gitlab-has-changed-issues-to-work-items/17492)

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**Author:** [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)\
**Replies:** 0\
**Last updated:** [March 24, 2026, 5:18pm UTC](https://discourse.paraview.org/t/gitlab-has-changed-issues-to-work-items/17492 "2026-03-24T17:18:00Z")

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GitLab has for a while supported different kinds of reports: “Issues”, “Tasks”, and “Incidents”. GitLab interface continued to refer to these collectively as “Issues”. If you wanted to file a bug you would file it under …

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## [CGNS plugin support for ZonePointers / time-varying topology](https://discourse.paraview.org/t/cgns-plugin-support-for-zonepointers-time-varying-topology/17480)

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**Author:** [@nitawa](https://discourse.paraview.org/u/nitawa)\
**Replies:** 1\
**Last updated:** [March 18, 2026, 8:47am UTC](https://discourse.paraview.org/t/cgns-plugin-support-for-zonepointers-time-varying-topology/17480 "2026-03-18T08:47:03Z")

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Dear ParaView experts and developers, We are trying to visualize a CGNS file that follows the CGNS SIDS standard for time-varying unstructured meshes with changing topology. The recommended CGNS SIDS approach for this …

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## [Streaming Status in ParaView](https://discourse.paraview.org/t/streaming-status-in-paraview/17478)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 1\
**Last updated:** [March 17, 2026, 2:54pm UTC](https://discourse.paraview.org/t/streaming-status-in-paraview/17478 "2026-03-17T14:54:22Z")

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ParaView has a little known and little used streaming options, available in “Edit → Settings → Enable Streaming”. Once enabled, some streaming are supposed to be available, however they have been forgotten for a while, …

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## [What build options to use when contributing to ParaView?](https://discourse.paraview.org/t/what-build-options-to-use-when-contributing-to-paraview/17448)

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**Author:** [@CsatiZoltan](https://discourse.paraview.org/u/CsatiZoltan)\
**Replies:** 3\
**Last updated:** [February 19, 2026, 12:26pm UTC](https://discourse.paraview.org/t/what-build-options-to-use-when-contributing-to-paraview/17448 "2026-02-19T12:26:39Z")

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I will contribute to ParaView. What CMake options do I have to use to build my ParaView? I know that the CI will anyway run the tests based on its own config, but I want to test locally before submitting.

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## [Accessing the currently active camera in a cpp plugin](https://discourse.paraview.org/t/accessing-the-currently-active-camera-in-a-cpp-plugin/17438)

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**Author:** [@Caldera\_99](https://discourse.paraview.org/u/Caldera_99)\
**Replies:** 2\
**Last updated:** [February 11, 2026, 11:35am UTC](https://discourse.paraview.org/t/accessing-the-currently-active-camera-in-a-cpp-plugin/17438 "2026-02-11T11:35:58Z")

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Hello, I am currently trying to develop a small plugin that exposes some camera controls I often need. As a starting off point I copied and compiled the SourceToolbar example. After modifying some of the buttons to get…

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## [Implementing \`.series\` support for ExodusII](https://discourse.paraview.org/t/implementing-series-support-for-exodusii/17425)

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**Author:** [@drwells](https://discourse.paraview.org/u/drwells)\
**Replies:** 0\
**Last updated:** [February 3, 2026, 8:04am UTC](https://discourse.paraview.org/t/implementing-series-support-for-exodusii/17425 "2026-02-03T08:04:35Z")

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Hello! While I could use .ex-timeseries, I’d prefer to use the newer .series syntax. I tried adding this myself by following the approach in https://gitlab.kitware.com/paraview/paraview/-/merge\_requests/2532 (i.e., by ad…

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## [How to link with external library?](https://discourse.paraview.org/t/how-to-link-with-external-library/17410)

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**Author:** [@CsatiZoltan](https://discourse.paraview.org/u/CsatiZoltan)\
**Replies:** 6\
**Last updated:** [January 28, 2026, 7:28pm UTC](https://discourse.paraview.org/t/how-to-link-with-external-library/17410 "2026-01-28T19:28:18Z")

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Hi, I have a C++ ParaView plugin that does not use VTK (so no vtk.module file). I want to link my plugin with the external library spdlog, which is contained as a Git submodule in my project. This library integrates wel…

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## [Cannot select first opacity control point with mouse in transfer function editor because scalar-range handle blocks this option](https://discourse.paraview.org/t/cannot-select-first-opacity-control-point-with-mouse-in-transfer-function-editor-because-scalar-range-handle-blocks-this-option/17312)

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**Author:** [@swilliams\_KMT](https://discourse.paraview.org/u/swilliams_KMT)\
**Replies:** 5\
**Last updated:** [January 23, 2026, 9:00am UTC](https://discourse.paraview.org/t/cannot-select-first-opacity-control-point-with-mouse-in-transfer-function-editor-because-scalar-range-handle-blocks-this-option/17312 "2026-01-23T09:00:05Z")

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I see this issue has been raised a few times over the years but it still persists. The leftmost (and rightmost) opacity control points in the transfer-function editor cannot be selected with the mouse because the scalar…

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## [vtkHardwareSelector - without GPU?](https://discourse.paraview.org/t/vtkhardwareselector-without-gpu/17405)

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**Author:** [@JT3DAI](https://discourse.paraview.org/u/JT3DAI)\
**Replies:** 0\
**Last updated:** [January 21, 2026, 6:38pm UTC](https://discourse.paraview.org/t/vtkhardwareselector-without-gpu/17405 "2026-01-21T18:38:54Z")

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Hi guys, I have the function below that returns all visible points in the renderer from a mesh obj. Its fast and it is accurate but my understanding is that it requires a GPU. This has been fine as locally there is a GP…

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## [How to define an entry point when using \`paraview\_client\_add\`?](https://discourse.paraview.org/t/how-to-define-an-entry-point-when-using-paraview-client-add/17378)

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**Author:** [@CsatiZoltan](https://discourse.paraview.org/u/CsatiZoltan)\
**Replies:** 2\
**Last updated:** [January 2, 2026, 9:02am UTC](https://discourse.paraview.org/t/how-to-define-an-entry-point-when-using-paraview-client-add/17378 "2026-01-02T09:02:06Z")

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I would like to make ParaView accept custom command line arguments in my ParaView custom application. To achieve that, I want to pass the optional argument of type vtkCLIOptions\* to the pqPVApplicationCore constructor. Y…

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## [Remember the most recent opened directory](https://discourse.paraview.org/t/remember-the-most-recent-opened-directory/17368)

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**Author:** [@CsatiZoltan](https://discourse.paraview.org/u/CsatiZoltan)\
**Replies:** 2\
**Last updated:** [December 12, 2025, 12:31pm UTC](https://discourse.paraview.org/t/remember-the-most-recent-opened-directory/17368 "2025-12-12T12:31:53Z")

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Hi, I noticed that ParaView (and CMB too) does not remember the most recently opened directory after a restart. I.e. when you click on File → Open…, it offers the same default directory (which is $HOME on my machine). I…

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## [MP4 export fails when output path contains non-ASCII characters (e.g. Japanese)](https://discourse.paraview.org/t/mp4-export-fails-when-output-path-contains-non-ascii-characters-e-g-japanese/17357)

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**Author:** [@Japan\_OpenDEM](https://discourse.paraview.org/u/Japan_OpenDEM)\
**Replies:** 3\
**Last updated:** [December 10, 2025, 8:14am UTC](https://discourse.paraview.org/t/mp4-export-fails-when-output-path-contains-non-ascii-characters-e-g-japanese/17357 "2025-12-10T08:14:18Z")

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When exporting an MP4 video, ParaView cannot correctly generate the file if the output path contains non-ASCII characters (e.g., Japanese).

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## [Qt minimum version will be updated to 5.15](https://discourse.paraview.org/t/qt-minimum-version-will-be-updated-to-5-15/17354)

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**Author:** [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)\
**Replies:** 5\
**Last updated:** [December 9, 2025, 12:14am UTC](https://discourse.paraview.org/t/qt-minimum-version-will-be-updated-to-5-15/17354 "2025-12-09T00:14:46Z")

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ParaView currently does not build against Qt 5.12, which was end-of-lifed in 2021. We are planning to make the minimum 5.15 for ParaView 6.1. Please let us know if that causes any difficulties. Update: In ParaView 6.2, …

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## [ParaView Async: update on on-going efforts](https://discourse.paraview.org/t/paraview-async-update-on-on-going-efforts/9214)

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**Author:** [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)\
**Replies:** 18\
**Last updated:** [December 1, 2025, 1:26pm UTC](https://discourse.paraview.org/t/paraview-async-update-on-on-going-efforts/9214 "2025-12-01T13:26:28Z")

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Those who scanned through the Scientific Visualization in 2022 blog may have noticed that there are some exciting new ways in which we are trying to evolve the ParaView ecosystem. One of those directions is what we’ve b…

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## [segfault importing vtkhdf files](https://discourse.paraview.org/t/segfault-importing-vtkhdf-files/17317)

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**Author:** [@philipdeegan](https://discourse.paraview.org/u/philipdeegan)\
**Replies:** 11\
**Last updated:** [November 18, 2025, 12:39pm UTC](https://discourse.paraview.org/t/segfault-importing-vtkhdf-files/17317 "2025-11-18T12:39:24Z")

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Hi there, I’m experiencing a segfault importing vtkhdf files with paraview 5.13, 6.0.0, and 6.0.1 This only seems to happen on fedora, I do not get a segfault on debian 13 Any ideas? application called MPI\_Abort(MPI\_…

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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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## [Unable set line display type like dot.](https://discourse.paraview.org/t/unable-set-line-display-type-like-dot/17301)

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**Author:** [@Gastbye\_Liu](https://discourse.paraview.org/u/Gastbye_Liu)\
**Replies:** 1\
**Last updated:** [November 12, 2025, 7:36am UTC](https://discourse.paraview.org/t/unable-set-line-display-type-like-dot/17301 "2025-11-12T07:36:23Z")

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I have a vtk file for line segments (as follows). And I want to show the dot line in paraview. Does paraview have the function for that? vtk DataFile Version 2.0 Point and Line Data ASCII DATASET POLYDATA POINTS 4 f…

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## [vtkAffineArray](https://discourse.paraview.org/t/vtkaffinearray/14780)

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**Author:** [@jfavre](https://discourse.paraview.org/u/jfavre)\
**Replies:** 6\
**Last updated:** [October 28, 2025, 2:11pm UTC](https://discourse.paraview.org/t/vtkaffinearray/14780 "2025-10-28T14:11:39Z")

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in a ParaView I/O plugin for particle data, I am attempting to replace this simple piece of code creating the connectivity list for a POLY\_VERTEXCELL (code inspired from vtkConvertToPointCloud) std::vector\<vtkIdType\> …

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## [Unique node numeration on edges of vtkLagrangeTetra](https://discourse.paraview.org/t/unique-node-numeration-on-edges-of-vtklagrangetetra/17242)

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**Author:** [@jeDuck](https://discourse.paraview.org/u/jeDuck)\
**Replies:** 3\
**Last updated:** [October 27, 2025, 6:07pm UTC](https://discourse.paraview.org/t/unique-node-numeration-on-edges-of-vtklagrangetetra/17242 "2025-10-27T18:07:33Z")

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Hello! In most vtkCell types if the function GetEdge() is called, the points on the edge are in such order: first point, then last point, and then the remaining points in sequence. This is not the case for vtkLagrangeTe…

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## [Proxy modified state is different in Python](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055)

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**Author:** [@jeDuck](https://discourse.paraview.org/u/jeDuck)\
**Replies:** 6\
**Last updated:** [October 21, 2025, 12:25pm UTC](https://discourse.paraview.org/t/proxy-modified-state-is-different-in-python/17055 "2025-10-21T12:25:55Z")

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Hello! When I open some model and create a filter on it (Clip, for example), the modified state on Clip proxy in pqFiltersMenuReaction is UNINITIALIZED. However, when I do the same in Python, reader = OpenDataFile(‘myfi…

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## [Export to .vtkjs Fails When Filename Contains Spaces](https://discourse.paraview.org/t/export-to-vtkjs-fails-when-filename-contains-spaces/17240)

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**Author:** [@alauditi](https://discourse.paraview.org/u/alauditi)\
**Replies:** 1\
**Last updated:** [October 13, 2025, 4:54pm UTC](https://discourse.paraview.org/t/export-to-vtkjs-fails-when-filename-contains-spaces/17240 "2025-10-13T16:54:02Z")

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Hi everyone, I wanted to report a bug I encountered when exporting files to the .vtkjs format using Paraview version 6.0.0. When I try to export a file and the filename contains a space (for example, my file.vtkjs), th…

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## [Problem generating non-orthogonal structured grid in Python plugin with temporal data](https://discourse.paraview.org/t/problem-generating-non-orthogonal-structured-grid-in-python-plugin-with-temporal-data/17233)

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**Author:** [@\_Marco](https://discourse.paraview.org/u/_Marco)\
**Replies:** 5\
**Last updated:** [October 8, 2025, 10:27am UTC](https://discourse.paraview.org/t/problem-generating-non-orthogonal-structured-grid-in-python-plugin-with-temporal-data/17233 "2025-10-08T10:27:42Z")

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Hi ParaView developers, I’m developing a Python plugin for ParaView that produces time-evolving datasets. The goal is to generate a structured 3D grid with full control of the coordinates (x, y, z), where: x and y ca…

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