# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=155

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

**Page:** 156

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## [Programable Filter Freezing](https://discourse.paraview.org/t/programable-filter-freezing/6223)

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**Author:** [@zwilde](https://discourse.paraview.org/u/zwilde)\
**Replies:** 10\
**Last updated:** [January 22, 2021, 1:19am UTC](https://discourse.paraview.org/t/programable-filter-freezing/6223 "2021-01-22T01:19:47Z")

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I have started trying to run Programmable filters and any attempt to use them results in Paraview freezing. I get no output messages, just a freeze. I imagine it is something in my system but without any outputs. I am no…

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## [Euclidian Distance or Watershed of Unstructured Grid?](https://discourse.paraview.org/t/euclidian-distance-or-watershed-of-unstructured-grid/6275)

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**Author:** [@zwilde](https://discourse.paraview.org/u/zwilde)\
**Replies:** 0\
**Last updated:** [January 21, 2021, 10:28pm UTC](https://discourse.paraview.org/t/euclidian-distance-or-watershed-of-unstructured-grid/6275 "2021-01-21T22:28:47Z")

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I am trying to take a thresholded grid and apply some type of watershed filter to separate out features that are should be separate but the connectivity filter places as the same region. Is there some way to this on a gr…

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## [Operations By Region ID?](https://discourse.paraview.org/t/operations-by-region-id/6274)

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**Author:** [@zwilde](https://discourse.paraview.org/u/zwilde)\
**Replies:** 0\
**Last updated:** [January 21, 2021, 10:17pm UTC](https://discourse.paraview.org/t/operations-by-region-id/6274 "2021-01-21T22:17:06Z")

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This is similar to https://discourse.paraview.org/t/summing-cell-values-in-region/4201 where I would like to do a number of operations on different RegionId’s at each time step (ex. integrate cell data) and store it in …

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## [ParaView 5.9.0-RC3 build dependency issue with vtkcatalyst](https://discourse.paraview.org/t/paraview-5-9-0-rc3-build-dependency-issue-with-vtkcatalyst/6272)

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**Author:** [@nima.tofighi](https://discourse.paraview.org/u/nima.tofighi)\
**Replies:** 0\
**Last updated:** [January 21, 2021, 5:53pm UTC](https://discourse.paraview.org/t/paraview-5-9-0-rc3-build-dependency-issue-with-vtkcatalyst/6272 "2021-01-21T17:53:30Z")

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I have been facing problems building ParaView 5.9.0-RC3 (and RC4, but the example here is from RC3) using a custom script attached here (makeParaView\_v59\_nompi): makeParaView\_v59\_nompi (1.0 KB) The piped output is here …

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## [ColorBy(rep,value=None) results in RuntimeError](https://discourse.paraview.org/t/colorby-rep-value-none-results-in-runtimeerror/6263)

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**Author:** [@oponkork](https://discourse.paraview.org/u/oponkork)\
**Replies:** 4\
**Last updated:** [January 21, 2021, 4:01pm UTC](https://discourse.paraview.org/t/colorby-rep-value-none-results-in-runtimeerror/6263 "2021-01-21T16:01:30Z")

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Using colorBy(rep,value=None) in a python script results in the following error: \>\>\> Traceback (most recent call last): File "/usr/lib/python3.9/site-packages/paraview/servermanager.py", line 3190, in GetAssociationFr…

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## [Can Ambient Oclusion be used with a Background Texture?](https://discourse.paraview.org/t/can-ambient-oclusion-be-used-with-a-background-texture/6268)

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**Author:** [@jfavre](https://discourse.paraview.org/u/jfavre)\
**Replies:** 1\
**Last updated:** [January 21, 2021, 2:33pm UTC](https://discourse.paraview.org/t/can-ambient-oclusion-be-used-with-a-background-texture/6268 "2021-01-21T14:33:39Z")

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Am using 5.9-RC4. Have a view with a Texture: renderView2.UseTexturedBackground = 1 renderView2.BackgroundTexture = my\_texture renderView2.UseAmbientOcclusion = 1 I have noticed that when turning Ambient Occlusion …

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## [Keyboard shortcuts in interactive mode](https://discourse.paraview.org/t/keyboard-shortcuts-in-interactive-mode/5307)

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**Author:** [@David\_Cortes](https://discourse.paraview.org/u/David_Cortes)\
**Replies:** 2\
**Last updated:** [January 21, 2021, 2:30pm UTC](https://discourse.paraview.org/t/keyboard-shortcuts-in-interactive-mode/5307 "2021-01-21T14:30:22Z")

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When running Paraview from a Python script, I set the Interactive mode by calling paraview.simple.Interact(). If I read multiple VTK files I can Play the animation and save every snapshot, but I would like to move forwar…

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## [Order of integration with integrate variables filter](https://discourse.paraview.org/t/order-of-integration-with-integrate-variables-filter/6265)

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**Author:** [@kschau](https://discourse.paraview.org/u/kschau)\
**Replies:** 0\
**Last updated:** [January 21, 2021, 1:22pm UTC](https://discourse.paraview.org/t/order-of-integration-with-integrate-variables-filter/6265 "2021-01-21T13:22:25Z")

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What is the order of accuracy for ParaView/VTK’s various integration implementations. If I have a 2D slice that is triangulated, what is the order of accuracy for that surface integration with the IntegrateVariables fil…

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## [Visualization issue for Ensight Gold imported data](https://discourse.paraview.org/t/visualization-issue-for-ensight-gold-imported-data/6258)

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**Author:** [@MiguelAngelAGUIRRE](https://discourse.paraview.org/u/MiguelAngelAGUIRRE)\
**Replies:** 2\
**Last updated:** [January 21, 2021, 12:23pm UTC](https://discourse.paraview.org/t/visualization-issue-for-ensight-gold-imported-data/6258 "2021-01-21T12:23:42Z")

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Hello, I have a visualization issue with an imported CFD data from STAR CCM solver. The data is imported into Paraview 5.7 by using Ensight Gold Case. The CFD data is the flow past a cylinder and there is a visualizatio…

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## [3D visualization from unregular points distribution](https://discourse.paraview.org/t/3d-visualization-from-unregular-points-distribution/6264)

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**Author:** [@lorenzo](https://discourse.paraview.org/u/lorenzo)\
**Replies:** 5\
**Last updated:** [January 21, 2021, 12:14pm UTC](https://discourse.paraview.org/t/3d-visualization-from-unregular-points-distribution/6264 "2021-01-21T12:14:53Z")

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Hi everyone, I’m not very experienced on Paraview world. I have a trouble about the best solution to create a 3D visualization from unregular points distribution. Attached the table to point filter of my dataset. Red…

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## [Difficulty with Stream Lines Representation plugin](https://discourse.paraview.org/t/difficulty-with-stream-lines-representation-plugin/3485)

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**Author:** [@Nick](https://discourse.paraview.org/u/Nick)\
**Replies:** 15\
**Last updated:** [January 21, 2021, 12:13pm UTC](https://discourse.paraview.org/t/difficulty-with-stream-lines-representation-plugin/3485 "2021-01-21T12:13:34Z")

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Hi All - I am trying to apply the streamlines representation plugin to streamlines and having some trouble getting the animation applied to the data within the case. Please le…

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## [Issue with programmable filter in ParaView 5.9](https://discourse.paraview.org/t/issue-with-programmable-filter-in-paraview-5-9/6249)

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**Author:** [@ebreard](https://discourse.paraview.org/u/ebreard)\
**Replies:** 2\
**Last updated:** [January 20, 2021, 11:27pm UTC](https://discourse.paraview.org/t/issue-with-programmable-filter-in-paraview-5-9/6249 "2021-01-20T23:27:05Z")

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Hi, I was running in ParaView 5.9 RC2 this programmable filter which calculates averages of all cells along a given axis, within a defined domain.This works in ParaView 5.5, but not in 5.9: error 1 : xrange is not def…

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## [vtkTemporalStatistics in Programmable Filter](https://discourse.paraview.org/t/vtktemporalstatistics-in-programmable-filter/6252)

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**Author:** [@MiguelAngelAGUIRRE](https://discourse.paraview.org/u/MiguelAngelAGUIRRE)\
**Replies:** 4\
**Last updated:** [January 20, 2021, 1:07pm UTC](https://discourse.paraview.org/t/vtktemporalstatistics-in-programmable-filter/6252 "2021-01-20T13:07:54Z")

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Hello, I wonder if someone can provide me some code snippet showing how to implement “vtkTemporalStatistics” in a Python Programmable Filter (I want to obtain the standard deviation of time varying data without using th…

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## [OSPRay Multi Node Question](https://discourse.paraview.org/t/ospray-multi-node-question/6253)

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**Author:** [@mconti](https://discourse.paraview.org/u/mconti)\
**Replies:** 2\
**Last updated:** [January 19, 2021, 7:51pm UTC](https://discourse.paraview.org/t/ospray-multi-node-question/6253 "2021-01-19T19:51:21Z")

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Hey all, looking at the updated 5.9 release notes I noted this paragraph under OSPRay updates Does these mean we can now run ParaView with OSPRay sessions in parallel with multiple nodes? I tried loading these env var…

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## [Questions about VR capabilities](https://discourse.paraview.org/t/questions-about-vr-capabilities/1839)

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**Author:** [@Mike](https://discourse.paraview.org/u/Mike)\
**Replies:** 2\
**Last updated:** [January 19, 2021, 8:40am UTC](https://discourse.paraview.org/t/questions-about-vr-capabilities/1839 "2021-01-19T08:40:04Z")

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I have 2 questions about using ParaView with a VR headset: When I’m using the headset and I try to visualize how my data evolves over time by pressing the play button, the view in the headset just becomes dark. If I …

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## [cannot use log scale due to opengl texture problem](https://discourse.paraview.org/t/cannot-use-log-scale-due-to-opengl-texture-problem/848)

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**Author:** [@bradley](https://discourse.paraview.org/u/bradley)\
**Replies:** 7\
**Last updated:** [January 19, 2021, 4:41am UTC](https://discourse.paraview.org/t/cannot-use-log-scale-due-to-opengl-texture-problem/848 "2021-01-19T04:41:45Z")

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I am using Paraview 5.2.0 on Fedora 25 with an NVidia GT 440 graphics card. I want to do volume rendering. My data covers several orders of magnitude, so I need to use a log scale for the color map. However, when I cl…

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## [How to plot streamline on 2D velocity contour?](https://discourse.paraview.org/t/how-to-plot-streamline-on-2d-velocity-contour/6225)

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**Author:** [@fidu13](https://discourse.paraview.org/u/fidu13)\
**Replies:** 5\
**Last updated:** [January 18, 2021, 3:50pm UTC](https://discourse.paraview.org/t/how-to-plot-streamline-on-2d-velocity-contour/6225 "2021-01-18T15:50:25Z")

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I have some simulations done with openfoam and have some wind tunnel data, where I have the vertical and streamline velocity. I would like to compare this two with a image including the velocity magnitude contour and str…

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## [Setting nonlinear subdivision level through script](https://discourse.paraview.org/t/setting-nonlinear-subdivision-level-through-script/6250)

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**Author:** [@vachan-potluri](https://discourse.paraview.org/u/vachan-potluri)\
**Replies:** 0\
**Last updated:** [January 18, 2021, 9:28am UTC](https://discourse.paraview.org/t/setting-nonlinear-subdivision-level-through-script/6250 "2021-01-18T09:28:52Z")

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Hi, I have ParaView 5.6 and a bunch of pvtu files on a server to visualise. These contain high order data and I want to extract data over a line using a script. I have a working script for the default case (linear cell…

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## [Dose the Map Scalars Botton have been removed on the lastest vesion (e.g, 5.8.0 and 5.9.0)](https://discourse.paraview.org/t/dose-the-map-scalars-botton-have-been-removed-on-the-lastest-vesion-e-g-5-8-0-and-5-9-0/6235)

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**Author:** [@Jared\_Yuu](https://discourse.paraview.org/u/Jared_Yuu)\
**Replies:** 2\
**Last updated:** [January 18, 2021, 7:57am UTC](https://discourse.paraview.org/t/dose-the-map-scalars-botton-have-been-removed-on-the-lastest-vesion-e-g-5-8-0-and-5-9-0/6235 "2021-01-18T07:57:54Z")

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I have used this feature to coloring my image by an array on previous version (v 5.7.0), but I couldn’t found this selection on latter version. Here is the location of map scalars on version 5.7.0

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## [Visualisation of quadratic edge](https://discourse.paraview.org/t/visualisation-of-quadratic-edge/6241)

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**Author:** [@bmxam](https://discourse.paraview.org/u/bmxam)\
**Replies:** 2\
**Last updated:** [January 17, 2021, 8:46am UTC](https://discourse.paraview.org/t/visualisation-of-quadratic-edge/6241 "2021-01-17T08:46:19Z")

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Hi, Is it possible to visualize the “curved” edges of a mesh composed of quadratic edges? I tried to increase the Nonlinear Subdivision Level but nothing changes. With a “volumic” mesh, this settings seems to work well…

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## [Paraview issue on Big Sur](https://discourse.paraview.org/t/paraview-issue-on-big-sur/6239)

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**Author:** [@ramc](https://discourse.paraview.org/u/ramc)\
**Replies:** 0\
**Last updated:** [January 16, 2021, 12:18pm UTC](https://discourse.paraview.org/t/paraview-issue-on-big-sur/6239 "2021-01-16T12:18:22Z")

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Dear Developers! I am facing issue on my MacBook Pro 16" running Big Sur. I have installed paraview latest version but I could only run for 2 or 3 times after that it freezes and I cannot open pvd/vtk files to view agai…

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## [Find Data - Large Cell ID Selection](https://discourse.paraview.org/t/find-data-large-cell-id-selection/6193)

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**Author:** [@yamartinezgomez](https://discourse.paraview.org/u/yamartinezgomez)\
**Replies:** 7\
**Last updated:** [January 16, 2021, 7:54am UTC](https://discourse.paraview.org/t/find-data-large-cell-id-selection/6193 "2021-01-16T07:54:30Z")

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Hello, I currently have a \*.vtk file that is approximately 3 million cells. I have specific Cell ID’s that I would like to highlight/view. For this, I open ParaView, load my object (vtk file). I go to Edit -\> Find Da…

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## [Does paraview support quadratic cgns files and visualize high order mesh and solutions?](https://discourse.paraview.org/t/does-paraview-support-quadratic-cgns-files-and-visualize-high-order-mesh-and-solutions/6146)

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**Author:** [@daxian](https://discourse.paraview.org/u/daxian)\
**Replies:** 12\
**Last updated:** [January 15, 2021, 6:54pm UTC](https://discourse.paraview.org/t/does-paraview-support-quadratic-cgns-files-and-visualize-high-order-mesh-and-solutions/6146 "2021-01-15T18:54:21Z")

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Hello, I read in a quadratic cgns file with solutions without any problems. However, it appears paraview only extracted the linear mesh and data. Do I need a special filter to visualize native cgns files in high order m…

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## [VTU file cell and point numbers](https://discourse.paraview.org/t/vtu-file-cell-and-point-numbers/6229)

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**Author:** [@henry2004y](https://discourse.paraview.org/u/henry2004y)\
**Replies:** 0\
**Last updated:** [January 15, 2021, 2:38pm UTC](https://discourse.paraview.org/t/vtu-file-cell-and-point-numbers/6229 "2021-01-15T14:38:35Z")

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Hello, I have generated an unstructured VTU voxel type point data file from a model that utilizes AMR Cartesian grid. At the boundary where the resolution changes, the voxel may have same point index for some of the nod…

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## [Merging together results from SimVascular and ITK-SNAP](https://discourse.paraview.org/t/merging-together-results-from-simvascular-and-itk-snap/6226)

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**Author:** [@Jessblair11](https://discourse.paraview.org/u/Jessblair11)\
**Replies:** 0\
**Last updated:** [January 15, 2021, 5:09am UTC](https://discourse.paraview.org/t/merging-together-results-from-simvascular-and-itk-snap/6226 "2021-01-15T05:09:12Z")

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Hello! I was hoping to get some help on the models I have created with SimVascular and ITK-SNAP. I wanted to combine the models (heart chambers) from ITK-SNAP and the models from SimVascular (coronary arteries, valves, …

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## [Repeatedly calling ParaView from Matlab - run in existing GUI window?](https://discourse.paraview.org/t/repeatedly-calling-paraview-from-matlab-run-in-existing-gui-window/6221)

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**Author:** [@Jimbles](https://discourse.paraview.org/u/Jimbles)\
**Replies:** 4\
**Last updated:** [January 14, 2021, 3:30pm UTC](https://discourse.paraview.org/t/repeatedly-calling-paraview-from-matlab-run-in-existing-gui-window/6221 "2021-01-14T15:30:17Z")

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I am writing a function to call paraview from matlab for better visualisation (in Windows). Currently matlab writes some settings and target VTU/K filenames to a json file and then a python script reads this and displays…

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## [using "find data" aka "extract selection" with python scripting](https://discourse.paraview.org/t/using-find-data-aka-extract-selection-with-python-scripting/562)

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**Author:** [@J\_R-J](https://discourse.paraview.org/u/J_R-J)\
**Replies:** 7\
**Last updated:** [January 14, 2021, 3:33am UTC](https://discourse.paraview.org/t/using-find-data-aka-extract-selection-with-python-scripting/562 "2021-01-14T03:33:07Z")

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Hi there, I am trying to script some data processing in paraview. Specifically, importing a vti file and using “find data matching various criteria” to find the points which meet my criteria (eg: propertyX \<= 0). When I…

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## [Creating a 'nice' orbit path for an animation](https://discourse.paraview.org/t/creating-a-nice-orbit-path-for-an-animation/6216)

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**Author:** [@Ada12](https://discourse.paraview.org/u/Ada12)\
**Replies:** 5\
**Last updated:** [January 13, 2021, 7:10pm UTC](https://discourse.paraview.org/t/creating-a-nice-orbit-path-for-an-animation/6216 "2021-01-13T19:10:52Z")

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I’ll start with - I’m definitely being dumb here, but after 2 days of trying to execute I’m out of ideas. I want to make a camera orbit fully around my 3D rendering - think when you’re customising a model in some 3D gam…

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## [Smoothing the output of Rotational Extrusion](https://discourse.paraview.org/t/smoothing-the-output-of-rotational-extrusion/6211)

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**Author:** [@woodscn](https://discourse.paraview.org/u/woodscn)\
**Replies:** 7\
**Last updated:** [January 13, 2021, 5:35pm UTC](https://discourse.paraview.org/t/smoothing-the-output-of-rotational-extrusion/6211 "2021-01-13T17:35:32Z")

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I’m trying to make a visually impressive (as in, I’m willing to sacrifice some technical accuracy) 3-D movie based on 2-D axisymmetric data. I’ll walk through the steps I’ve tried and the reasons why. I have cell-center…

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## [Opacity mapping makes colors disappear](https://discourse.paraview.org/t/opacity-mapping-makes-colors-disappear/6212)

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**Author:** [@liangwang0734](https://discourse.paraview.org/u/liangwang0734)\
**Replies:** 6\
**Last updated:** [January 13, 2021, 3:12pm UTC](https://discourse.paraview.org/t/opacity-mapping-makes-colors-disappear/6212 "2021-01-13T15:12:28Z")

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Simple 2d slice surface view, when using “Enable opacity mapping for surfaces”, the colors disappear altogether. I feel it might be a graphic card issue. Any ideas on how to debug this? Thank you for any suggestions. …

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