# Top

**URL:** https://discourse.paraview.org/top.md?page=169&period=all

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**Page:** 170

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## [issue with following height of free surface in VOF simulation, paraview crashes when using plot over time](https://discourse.paraview.org/t/issue-with-following-height-of-free-surface-in-vof-simulation-paraview-crashes-when-using-plot-over-time/16003)

<div class="topic-metadata">

**Author:** [@otaolafr](https://discourse.paraview.org/u/otaolafr)\
**Replies:** 2\
**Last updated:** [January 20, 2025, 5:06pm UTC](https://discourse.paraview.org/t/issue-with-following-height-of-free-surface-in-vof-simulation-paraview-crashes-when-using-plot-over-time/16003 "2025-01-20T17:06:29Z")

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Hello, I am having issues trying to follow the area of the interface on my VOF simulation. for this currently I am doing: contour over alpha.air=0.5 merge blocks connectivity region neared point at 0,0,0.5 integrate …

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## [Glitchy redering of model](https://discourse.paraview.org/t/glitchy-redering-of-model/14869)

<div class="topic-metadata">

**Author:** [@girindra](https://discourse.paraview.org/u/girindra)\
**Replies:** 2\
**Last updated:** [June 17, 2024, 10:36pm UTC](https://discourse.paraview.org/t/glitchy-redering-of-model/14869 "2024-06-17T22:36:55Z")

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I’m getting this issue in ParaView 5.10.1 where the rendering appears patchy, especially when zooming/ panning. Any idea why this is happening and possible fix?

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## [View Startup Command for client-server](https://discourse.paraview.org/t/view-startup-command-for-client-server/14625)

<div class="topic-metadata">

**Author:** [@woodscn](https://discourse.paraview.org/u/woodscn)\
**Replies:** 2\
**Last updated:** [May 14, 2024, 10:18pm UTC](https://discourse.paraview.org/t/view-startup-command-for-client-server/14625 "2024-05-14T22:18:20Z")

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Is there a way to view the startup command used when launching a particular client server session? I’m concerned I’m making a mistake somewhere when I’m mentally reconstructing it from my .pvsc.

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## [Assign a custom vtkRenderWindowInteractor to a view](https://discourse.paraview.org/t/assign-a-custom-vtkrenderwindowinteractor-to-a-view/12699)

<div class="topic-metadata">

**Author:** [@Mathews\_John](https://discourse.paraview.org/u/Mathews_John)\
**Replies:** 0\
**Last updated:** [August 14, 2023, 2:57pm UTC](https://discourse.paraview.org/t/assign-a-custom-vtkrenderwindowinteractor-to-a-view/12699 "2023-08-14T14:57:27Z")

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I made a custom filter in Python to plot data and interact with the data. However, the filter ends up calling the PlotData() filter within itself to achieve this. Is there a way to create a view and assign a custom inter…

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## [Paraview not showing molecule](https://discourse.paraview.org/t/paraview-not-showing-molecule/15899)

<div class="topic-metadata">

**Author:** [@Himanshu\_Sharma](https://discourse.paraview.org/u/Himanshu_Sharma)\
**Replies:** 6\
**Last updated:** [December 24, 2024, 9:57am UTC](https://discourse.paraview.org/t/paraview-not-showing-molecule/15899 "2024-12-24T09:57:01Z")

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I tried to open a Bohr-cml file in paraview. First time it showed the structure however agin second time when I opened it, it was showing only background

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## [How to get polydata offset and connectivity numpy arrays from a feature edges filter?](https://discourse.paraview.org/t/how-to-get-polydata-offset-and-connectivity-numpy-arrays-from-a-feature-edges-filter/16473)

<div class="topic-metadata">

**Author:** [@krvorren](https://discourse.paraview.org/u/krvorren)\
**Replies:** 1\
**Last updated:** [April 15, 2025, 5:03pm UTC](https://discourse.paraview.org/t/how-to-get-polydata-offset-and-connectivity-numpy-arrays-from-a-feature-edges-filter/16473 "2025-04-15T17:03:53Z")

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Hello, I’m trying to plot the outline of a 2d geometry in matplotlib using the point data from a feature edges filter. In ParaView, when I save the Feature Edge filter data as a vtk legacy file, it outputs a polydata da…

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## [paraview visualizer and python](https://discourse.paraview.org/t/paraview-visualizer-and-python/16171)

<div class="topic-metadata">

**Author:** [@monorepo](https://discourse.paraview.org/u/monorepo)\
**Replies:** 1\
**Last updated:** [February 13, 2025, 3:44pm UTC](https://discourse.paraview.org/t/paraview-visualizer-and-python/16171 "2025-02-13T15:44:59Z")

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how would one load a python script in paraview visualizer - is there something to the proxies.json file? Any way to load a state file?

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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)

<div class="topic-metadata">

**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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## [Creating Streamline with 3D coordinate vector values in csv. file](https://discourse.paraview.org/t/creating-streamline-with-3d-coordinate-vector-values-in-csv-file/15282)

<div class="topic-metadata">

**Author:** [@JHW](https://discourse.paraview.org/u/JHW)\
**Replies:** 5\
**Last updated:** [August 23, 2024, 7:40am UTC](https://discourse.paraview.org/t/creating-streamline-with-3d-coordinate-vector-values-in-csv-file/15282 "2024-08-23T07:40:35Z")

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Hello. I would like to generate streamline with my CSV. file I have measured 3D Coordinate vector value data. Tell me How to make a streamline in order. example) 3D Hexahedron vector value in CSV X, Y, Z, Velocity\_X…

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## [track the volume of cells for multiple bubble](https://discourse.paraview.org/t/track-the-volume-of-cells-for-multiple-bubble/12410)

<div class="topic-metadata">

**Author:** [@monaksh\_nayak](https://discourse.paraview.org/u/monaksh_nayak)\
**Replies:** 0\
**Last updated:** [June 28, 2023, 3:32pm UTC](https://discourse.paraview.org/t/track-the-volume-of-cells-for-multiple-bubble/12410 "2023-06-28T15:32:09Z")

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hello every one, i have simulating boiling cases can any one tell me how can i track the volume of multiple bubble nucleating in a 3d space at each and every time step for every single bubble. Can i use threshold and con…

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## [How to set value outside of domain with resample-to-image filter?](https://discourse.paraview.org/t/how-to-set-value-outside-of-domain-with-resample-to-image-filter/11501)

<div class="topic-metadata">

**Author:** [@Behzad](https://discourse.paraview.org/u/Behzad)\
**Replies:** 0\
**Last updated:** [February 26, 2023, 7:40am UTC](https://discourse.paraview.org/t/how-to-set-value-outside-of-domain-with-resample-to-image-filter/11501 "2023-02-26T07:40:46Z")

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Dear all, I would appreciate to know if there is an easy way to change the default value in the areas outside of the domain when using the resample-to-image filter in paraview? Currently, I got zero for the outside regi…

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## [Can't plot custom range while using "Plot Over Line"](https://discourse.paraview.org/t/cant-plot-custom-range-while-using-plot-over-line/16496)

<div class="topic-metadata">

**Author:** [@Smruti\_Ranjan\_Jena](https://discourse.paraview.org/u/Smruti_Ranjan_Jena)\
**Replies:** 2\
**Last updated:** [April 18, 2025, 6:28am UTC](https://discourse.paraview.org/t/cant-plot-custom-range-while-using-plot-over-line/16496 "2025-04-18T06:28:23Z")

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Dear Paraview Support, I am trying to plot a curve where the y-axis represents the velocity magnitude, whereas the x-axis represents the x-coordinates (image attached). In the properties panel, I can see that a custo…

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## [Triangle meshes for cone or cyllinder](https://discourse.paraview.org/t/triangle-meshes-for-cone-or-cyllinder/16209)

<div class="topic-metadata">

**Author:** [@ritwik](https://discourse.paraview.org/u/ritwik)\
**Replies:** 4\
**Last updated:** [February 21, 2025, 11:08am UTC](https://discourse.paraview.org/t/triangle-meshes-for-cone-or-cyllinder/16209 "2025-02-21T11:08:52Z")

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Dear developers, I am trying to generate triangle meshes for cyllinder or cone type shapes so that I can save the data in unstructured grid format. Previously I did it for sphere using Tesellate filter. Can someone sug…

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## [Log Scale for pure negative numbers](https://discourse.paraview.org/t/log-scale-for-pure-negative-numbers/16385)

<div class="topic-metadata">

**Author:** [@learex](https://discourse.paraview.org/u/learex)\
**Replies:** 0\
**Last updated:** [March 25, 2025, 2:19pm UTC](https://discourse.paraview.org/t/log-scale-for-pure-negative-numbers/16385 "2025-03-25T14:19:13Z")

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I often show isocontours for Lambda2 criterion and need a logarithmic scale for purely negative numbers, e.g. from -.01 to -.1. If I want to use the log scale I first need to insert a calculator flipping the sign, which …

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## [ParaView error when reading OpenSees VTU files with ASDAbsorbingBoundary](https://discourse.paraview.org/t/paraview-error-when-reading-opensees-vtu-files-with-asdabsorbingboundary/17683)

<div class="topic-metadata">

**Author:** [@Aliy1766](https://discourse.paraview.org/u/Aliy1766)\
**Replies:** 7\
**Last updated:** [August 25, 2026, 8:29am UTC](https://discourse.paraview.org/t/paraview-error-when-reading-opensees-vtu-files-with-asdabsorbingboundary/17683 "2026-08-25T08:29:54Z")

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Hello, I am using OpenSees for dynamic soil–structure interaction analysis and ParaView for post-processing the results. My model contains quad soil elements and structural elements. The VTK output works correctly in P…

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## [depixelating an image](https://discourse.paraview.org/t/depixelating-an-image/15436)

<div class="topic-metadata">

**Author:** [@Vamsi\_2001](https://discourse.paraview.org/u/Vamsi_2001)\
**Replies:** 7\
**Last updated:** [September 25, 2024, 9:33am UTC](https://discourse.paraview.org/t/depixelating-an-image/15436 "2024-09-25T09:33:05Z")

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How to depixalate an image in paraview such that the pixels will smoothen out,tried cell data to point data but it didnt worked out

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## [Extracting node set and element set information from Exodus file](https://discourse.paraview.org/t/extracting-node-set-and-element-set-information-from-exodus-file/15385)

<div class="topic-metadata">

**Author:** [@Jesse](https://discourse.paraview.org/u/Jesse)\
**Replies:** 1\
**Last updated:** [September 13, 2024, 7:35pm UTC](https://discourse.paraview.org/t/extracting-node-set-and-element-set-information-from-exodus-file/15385 "2024-09-13T19:35:05Z")

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I’d like to get node set and element set information from an Exodus file using pvpython. I’m interested in both: getting specific node/element IDs given the name of the set, and getting data from a specific variable gi…

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## [Animation of multiple columns in a single 3D vtu file](https://discourse.paraview.org/t/animation-of-multiple-columns-in-a-single-3d-vtu-file/14078)

<div class="topic-metadata">

**Author:** [@ABAM](https://discourse.paraview.org/u/ABAM)\
**Replies:** 1\
**Last updated:** [March 4, 2024, 1:01pm UTC](https://discourse.paraview.org/t/animation-of-multiple-columns-in-a-single-3d-vtu-file/14078 "2024-03-04T13:01:45Z")

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Dear experts, I have a single 3D vtu file with multiple columns and time series data. How can I do animation for time series data in that single vtu? Thanks in advance.

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## [render multiple views with single Catalyst Python script](https://discourse.paraview.org/t/render-multiple-views-with-single-catalyst-python-script/16891)

<div class="topic-metadata">

**Author:** [@uturuncoglu](https://discourse.paraview.org/u/uturuncoglu)\
**Replies:** 2\
**Last updated:** [July 10, 2026, 2:43pm UTC](https://discourse.paraview.org/t/render-multiple-views-with-single-catalyst-python-script/16891 "2026-07-10T14:43:40Z")

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Hi, I wonder if there is a way to output all the render views with Catalyst. In my case, I have four panel but the Catalyst Python script is only processing the one of them. Of course, I could create four different scri…

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## [Animating with 4 linked panels - no animation](https://discourse.paraview.org/t/animating-with-4-linked-panels-no-animation/16756)

<div class="topic-metadata">

**Author:** [@\_Marco](https://discourse.paraview.org/u/_Marco)\
**Replies:** 2\
**Last updated:** [June 1, 2025, 6:32pm UTC](https://discourse.paraview.org/t/animating-with-4-linked-panels-no-animation/16756 "2025-06-01T18:32:24Z")

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Hi. I am using Paraview 5.13.3 I have 4 horizontal panels, linked (camera linked), showing 4 different variables (the same variable, with different pre-processing). I created a camera path, zooming in and out, to show-c…

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## [Integrating Variables with ParaView with GDAL (v 5.13.0)](https://discourse.paraview.org/t/integrating-variables-with-paraview-with-gdal-v-5-13-0/15236)

<div class="topic-metadata">

**Author:** [@lostindirectories123](https://discourse.paraview.org/u/lostindirectories123)\
**Replies:** 2\
**Last updated:** [August 20, 2024, 7:22am UTC](https://discourse.paraview.org/t/integrating-variables-with-paraview-with-gdal-v-5-13-0/15236 "2024-08-20T07:22:01Z")

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Hello, I am a new user of ParaView and plan to use it to analyze geospatial datasets. I downloaded the most recent version of ParaView, and from what I understand since the release of v5.9.0 the software can handle geosp…

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## [How to create the edge of the sector](https://discourse.paraview.org/t/how-to-create-the-edge-of-the-sector/13722)

<div class="topic-metadata">

**Author:** [@Ruomiaoyang](https://discourse.paraview.org/u/Ruomiaoyang)\
**Replies:** 0\
**Last updated:** [January 17, 2024, 2:24am UTC](https://discourse.paraview.org/t/how-to-create-the-edge-of-the-sector/13722 "2024-01-17T02:24:50Z")

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As seen in the figure, the goal I want to reach is to extract the egde of the sector slice and contour it black.

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## [pvserver and pvbatch number of threads](https://discourse.paraview.org/t/pvserver-and-pvbatch-number-of-threads/16296)

<div class="topic-metadata">

**Author:** [@hunter.gilbert](https://discourse.paraview.org/u/hunter.gilbert)\
**Replies:** 1\
**Last updated:** [March 11, 2025, 2:09pm UTC](https://discourse.paraview.org/t/pvserver-and-pvbatch-number-of-threads/16296 "2025-03-11T14:09:28Z")

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I’m using the headless paraview 5.13.0 and have a question about threading and MPI parallelism. When I launch pvbatch or pvserver with no other options, it appears that by default there are as many threads created as CPU…

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## [Loading Exodus II files crashes ParaView on my Ubuntu 24 machine](https://discourse.paraview.org/t/loading-exodus-ii-files-crashes-paraview-on-my-ubuntu-24-machine/17323)

<div class="topic-metadata">

**Author:** [@rsaxena](https://discourse.paraview.org/u/rsaxena)\
**Replies:** 4\
**Last updated:** [November 21, 2025, 9:01am UTC](https://discourse.paraview.org/t/loading-exodus-ii-files-crashes-paraview-on-my-ubuntu-24-machine/17323 "2025-11-21T09:01:20Z")

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Hello, I have Paraview 6.0.0 installed on my machine running Ubuntu 24.04. The GUI opens nicely, but when I try loading Exodus II (\*.e) files, Paraview crashes with the following error message (see attached screenshot)…

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## [Install any python package question](https://discourse.paraview.org/t/install-any-python-package-question/17608)

<div class="topic-metadata">

**Author:** [@CsatiZoltan](https://discourse.paraview.org/u/CsatiZoltan)\
**Replies:** 3\
**Last updated:** [May 27, 2026, 9:05pm UTC](https://discourse.paraview.org/t/install-any-python-package-question/17608 "2026-05-27T21:05:17Z")

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@mwestphal I created the virtual environment successfully with pvpython: ./pvpython -m venv .venv But when I open the site packages directory (.venv/lib/python3.10/site-packages/), I do not see the actual Python packa…

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## [Assembly nodes in Multiblock Inspector expanded too far down the hierarchy](https://discourse.paraview.org/t/assembly-nodes-in-multiblock-inspector-expanded-too-far-down-the-hierarchy/16790)

<div class="topic-metadata">

**Author:** [@Tim\_Tautges](https://discourse.paraview.org/u/Tim_Tautges)\
**Replies:** 3\
**Last updated:** [June 11, 2025, 7:45am UTC](https://discourse.paraview.org/t/assembly-nodes-in-multiblock-inspector-expanded-too-far-down-the-hierarchy/16790 "2025-06-11T07:45:07Z")

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Hi all. I’ve implemented using PDC and vtkDataAssembly in my reader and it helps immensely, easier and much more efficient. One problem though: node hierarchy is expanded up to 4 levels down in the tree, and that’s unwie…

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## [Glyph filter, random scale value](https://discourse.paraview.org/t/glyph-filter-random-scale-value/16452)

<div class="topic-metadata">

**Author:** [@mehrpay](https://discourse.paraview.org/u/mehrpay)\
**Replies:** 3\
**Last updated:** [April 11, 2025, 7:33am UTC](https://discourse.paraview.org/t/glyph-filter-random-scale-value/16452 "2025-04-11T07:33:29Z")

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When using Paraview Glyph filter, the scale factor seems to be a random value. I think the rational default value would be 1. (e.g., when visualizing particles based on their associated diameter data), so I wonder if th…

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## [Smaller grid](https://discourse.paraview.org/t/smaller-grid/11274)

<div class="topic-metadata">

**Author:** [@Crown](https://discourse.paraview.org/u/Crown)\
**Replies:** 0\
**Last updated:** [January 26, 2023, 5:21am UTC](https://discourse.paraview.org/t/smaller-grid/11274 "2023-01-26T05:21:20Z")

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Hello guys, I am trying to use the Delaunay3D filter option to generate a 3D view of my data. When I obtained the 3D view, the grid seemed to be too large. Is there a way to use a smaller/finer grid in ParaView? Thank …

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## [Multiblock variables selection and availability in calculator filter](https://discourse.paraview.org/t/multiblock-variables-selection-and-availability-in-calculator-filter/15397)

<div class="topic-metadata">

**Author:** [@athos\_epa](https://discourse.paraview.org/u/athos_epa)\
**Replies:** 2\
**Last updated:** [September 16, 2024, 1:55pm UTC](https://discourse.paraview.org/t/multiblock-variables-selection-and-availability-in-calculator-filter/15397 "2024-09-16T13:55:38Z")

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Hello everyone, I’m trying to compute the Drag and Lift forces of a tumbling cylinder entering the atmosphere. From various tutorials online I found the procedure to do so with a series of filters. However, I noticed th…

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

<div class="topic-metadata">

**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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## [Large .vtk File ~2GB and 16284x16384 2D Grid Grey Block](https://discourse.paraview.org/t/large-vtk-file-2gb-and-16284x16384-2d-grid-grey-block/14069)

<div class="topic-metadata">

**Author:** [@ChemEng](https://discourse.paraview.org/u/ChemEng)\
**Replies:** 0\
**Last updated:** [March 1, 2024, 3:57pm UTC](https://discourse.paraview.org/t/large-vtk-file-2gb-and-16284x16384-2d-grid-grey-block/14069 "2024-03-01T15:57:54Z")

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Hello Paraview users, When attempting to open a very large ~2GB ASCII valued, 2D structured grid of a density field from a simulation, Paraview only opens a grey box and does not plot the density data. Furthermore, I ha…

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## [Stream tracer animation with Integration time](https://discourse.paraview.org/t/stream-tracer-animation-with-integration-time/16635)

<div class="topic-metadata">

**Author:** [@fatihmtlm](https://discourse.paraview.org/u/fatihmtlm)\
**Replies:** 1\
**Last updated:** [May 16, 2025, 8:02am UTC](https://discourse.paraview.org/t/stream-tracer-animation-with-integration-time/16635 "2025-05-16T08:02:03Z")

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I achieved smooth, continuous animations using the Iso Volume filter, but as I increase the number of streamlines it starts to slow down noticeably. The Threshold filter is much faster, yet the result is choppy and exhib…

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## [HyperTreeGrid .series](https://discourse.paraview.org/t/hypertreegrid-series/14444)

<div class="topic-metadata">

**Author:** [@omdaniel](https://discourse.paraview.org/u/omdaniel)\
**Replies:** 1\
**Last updated:** [April 22, 2024, 7:30am UTC](https://discourse.paraview.org/t/hypertreegrid-series/14444 "2024-04-22T07:30:05Z")

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I built a HyperTreeGrid with vtk and would like to import a set of htg files in time; however, htg files doesn’t seem to support the same .series extension as other files and while vtkXMLHyperTreeGridWriter has a WriteNe…

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## [How to force source proxy update all of its subproxies?](https://discourse.paraview.org/t/how-to-force-source-proxy-update-all-of-its-subproxies/14317)

<div class="topic-metadata">

**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [April 3, 2024, 7:22am UTC](https://discourse.paraview.org/t/how-to-force-source-proxy-update-all-of-its-subproxies/14317 "2024-04-03T07:22:17Z")

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Hello dear Paraview developers! Could you please explain how to force updating the source proxy’s subproxies? I have a filter, which does what I need, and has some filters as subproxies, but it does not show me what is…

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## [clean selection without message when run without anything selected](https://discourse.paraview.org/t/clean-selection-without-message-when-run-without-anything-selected/17416)

<div class="topic-metadata">

**Author:** [@otaolafr](https://discourse.paraview.org/u/otaolafr)\
**Replies:** 6\
**Last updated:** [February 2, 2026, 1:10pm UTC](https://discourse.paraview.org/t/clean-selection-without-message-when-run-without-anything-selected/17416 "2026-02-02T13:10:44Z")

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Hello, I am running a python script that clears selection, creates a selection and then extracts it, lastly clears the selection again. it works, but i am having a small annoyance, when running ClearSelection(), if i d…

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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)

<div class="topic-metadata">

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

<div class="topic-metadata">

**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")

</div>

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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## [Paraview Output Data Issue](https://discourse.paraview.org/t/paraview-output-data-issue/13372)

<div class="topic-metadata">

**Author:** [@liu\_amber](https://discourse.paraview.org/u/liu_amber)\
**Replies:** 0\
**Last updated:** [November 29, 2023, 10:01am UTC](https://discourse.paraview.org/t/paraview-output-data-issue/13372 "2023-11-29T10:01:28Z")

</div>

Hello Paraview users, I am currently using REEF3D and visualizing my simulation results through Paraview. In dealing with 3D problems, I have used filters to select “Integrate Variables” in data analysis, obtaining wate…

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## [Number of files in time series](https://discourse.paraview.org/t/number-of-files-in-time-series/15599)

<div class="topic-metadata">

**Author:** [@ThomasAC](https://discourse.paraview.org/u/ThomasAC)\
**Replies:** 4\
**Last updated:** [October 22, 2024, 11:52am UTC](https://discourse.paraview.org/t/number-of-files-in-time-series/15599 "2024-10-22T11:52:21Z")

</div>

Hi, I am writing a reader plugin and would like to make the plugin do something slightly different in case a time series is loaded. How do I get the number of files in a time series or how what is the simplest way to i…

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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)

<div class="topic-metadata">

**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")

</div>

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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## [Question on Programmable Filter using vtkPythonAlgorithmBase](https://discourse.paraview.org/t/question-on-programmable-filter-using-vtkpythonalgorithmbase/16495)

<div class="topic-metadata">

**Author:** [@Oracle\_0](https://discourse.paraview.org/u/Oracle_0)\
**Replies:** 2\
**Last updated:** [April 18, 2025, 2:25am UTC](https://discourse.paraview.org/t/question-on-programmable-filter-using-vtkpythonalgorithmbase/16495 "2025-04-18T02:25:29Z")

</div>

Hi, I have read many post from others earlier and it helped me a lot. I have a question that probably hasn’t asked earlier. I am using separate python script using vtkPythonAlgorithmBase and loading it through Manage Pl…

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## [be able to set default to plane parameters in clip/slice](https://discourse.paraview.org/t/be-able-to-set-default-to-plane-parameters-in-clip-slice/17686)

<div class="topic-metadata">

**Author:** [@otaolafr](https://discourse.paraview.org/u/otaolafr)\
**Replies:** 3\
**Last updated:** [August 24, 2026, 2:18pm UTC](https://discourse.paraview.org/t/be-able-to-set-default-to-plane-parameters-in-clip-slice/17686 "2026-08-24T14:18:03Z")

</div>

in regards to the improvements of the gui, one annoyance while working in paraview, is create a clip/slice, set up the specific cutting point, and while moving the camera, move the cutting point. Furthermore, if one sets…

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## [Problem with Temporal statistics](https://discourse.paraview.org/t/problem-with-temporal-statistics/15572)

<div class="topic-metadata">

**Author:** [@Niko](https://discourse.paraview.org/u/Niko)\
**Replies:** 1\
**Last updated:** [December 23, 2025, 9:33am UTC](https://discourse.paraview.org/t/problem-with-temporal-statistics/15572 "2025-12-23T09:33:39Z")

</div>

I have the results of five simulations with the same initial conditions but slightly different geometries. Before applying temporal statistics filter, I take a 2D slice. I used the same method for each case. In the end, …

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## [Error while fining mainimum value on cells extracted along line](https://discourse.paraview.org/t/error-while-fining-mainimum-value-on-cells-extracted-along-line/14536)

<div class="topic-metadata">

**Author:** [@h1773](https://discourse.paraview.org/u/h1773)\
**Replies:** 1\
**Last updated:** [May 2, 2024, 7:52am UTC](https://discourse.paraview.org/t/error-while-fining-mainimum-value-on-cells-extracted-along-line/14536 "2024-05-02T07:52:11Z")

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Hi i am extracting cells along a line and trying to find minimum value of a quantity on extracted cell but it is showing error. using paraview 5.12. Below the error is shown. Any suggestions? \*\*Error: Failed to evaluat…

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## [ParaView display issue: only part of the simulation view renders correctly for all OpenFOAM cases](https://discourse.paraview.org/t/paraview-display-issue-only-part-of-the-simulation-view-renders-correctly-for-all-openfoam-cases/17060)

<div class="topic-metadata">

**Author:** [@Shawn2701](https://discourse.paraview.org/u/Shawn2701)\
**Replies:** 1\
**Last updated:** [August 25, 2025, 11:16am UTC](https://discourse.paraview.org/t/paraview-display-issue-only-part-of-the-simulation-view-renders-correctly-for-all-openfoam-cases/17060 "2025-08-25T11:16:51Z")

</div>

Hi everyone, I’m having a problem with ParaView when trying to visualize my CFD simulations run with ParaFOAM/OpenFOAM. Only a small portion of the display screen shows the simulation correctly, while the rest remains b…

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## [How to manage several clients with different information with trame](https://discourse.paraview.org/t/how-to-manage-several-clients-with-different-information-with-trame/16917)

<div class="topic-metadata">

**Author:** [@Sagues](https://discourse.paraview.org/u/Sagues)\
**Replies:** 1\
**Last updated:** [August 2, 2025, 1:04am UTC](https://discourse.paraview.org/t/how-to-manage-several-clients-with-different-information-with-trame/16917 "2025-08-02T01:04:13Z")

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I am developing an application with trame. If I open several browser windows I see the same image and, if I rotate or execute any view operation (ex. zoom) I see the same image in both browser windows. I tried to use @…

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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)

<div class="topic-metadata">

**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")

</div>

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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## [Clip with max and min](https://discourse.paraview.org/t/clip-with-max-and-min/16425)

<div class="topic-metadata">

**Author:** [@giorgianig](https://discourse.paraview.org/u/giorgianig)\
**Replies:** 3\
**Last updated:** [April 3, 2025, 2:45pm UTC](https://discourse.paraview.org/t/clip-with-max-and-min/16425 "2025-04-03T14:45:51Z")

</div>

Dear all, When doing a clip with Clip Type=Scalar, a single value is asked. The clip is the done from the minimum value in the range to the chosen value, or from the chosen value to the max value in the range clicking “…

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## [Catalyst V2 C++ Example: python pipeline not recognized](https://discourse.paraview.org/t/catalyst-v2-c-example-python-pipeline-not-recognized/17298)

<div class="topic-metadata">

**Author:** [@Sam\_Austin](https://discourse.paraview.org/u/Sam_Austin)\
**Replies:** 2\
**Last updated:** [November 10, 2025, 3:19pm UTC](https://discourse.paraview.org/t/catalyst-v2-c-example-python-pipeline-not-recognized/17298 "2025-11-10T15:19:05Z")

</div>

I’m trying to run the Catalyst V2 C++ example, but the python pipeline is not running. Here is my setup: Ubuntu 24.04 Built Paraview 6.0.1 from source (regular build, not superbuild, but with MPI and catalyst enabled) B…

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## [Threading in a ParaView Python plugin (Linux)](https://discourse.paraview.org/t/threading-in-a-paraview-python-plugin-linux/15888)

<div class="topic-metadata">

**Author:** [@enricsosa](https://discourse.paraview.org/u/enricsosa)\
**Replies:** 2\
**Last updated:** [January 8, 2025, 1:14pm UTC](https://discourse.paraview.org/t/threading-in-a-paraview-python-plugin-linux/15888 "2025-01-08T13:14:14Z")

</div>

Hello, I was trying to use the threading library in a python plugin, but it doesn’t work exactly as I want it to. What I want is to create a thread that is always running continuously in the background, but currently I…

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