# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=165

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**Page:** 166

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## [Particle Size Increasing with Time with OSPRay On](https://discourse.paraview.org/t/particle-size-increasing-with-time-with-ospray-on/4681)

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**Author:** [@mconti](https://discourse.paraview.org/u/mconti)\
**Replies:** 8\
**Last updated:** [October 5, 2020, 3:16pm UTC](https://discourse.paraview.org/t/particle-size-increasing-with-time-with-ospray-on/4681 "2020-10-05T15:16:21Z")

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Hey everyone, came across a new OSPRay bug I’m hoping to get some help on. Most of my simulations have a lot of smooth particle hydrodynamic (SPH) particles. Basically, lots of small particles that I either represent as …

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## [How to extract data by intersecting dat. file and stl. file](https://discourse.paraview.org/t/how-to-extract-data-by-intersecting-dat-file-and-stl-file/5421)

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**Author:** [@mylee](https://discourse.paraview.org/u/mylee)\
**Replies:** 5\
**Last updated:** [October 5, 2020, 2:00pm UTC](https://discourse.paraview.org/t/how-to-extract-data-by-intersecting-dat-file-and-stl-file/5421 "2020-10-05T14:00:57Z")

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i have dat.file about pressure, velocity … and stl.file i want pressure distribution on the airfoil surface. so i try to intersect “plot on intersection curves” but it doesn’t work please help

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## [How to divide the coordinates / scale down the coordinates of vti file in paraview.](https://discourse.paraview.org/t/how-to-divide-the-coordinates-scale-down-the-coordinates-of-vti-file-in-paraview/5492)

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**Author:** [@rasunag27](https://discourse.paraview.org/u/rasunag27)\
**Replies:** 5\
**Last updated:** [October 5, 2020, 1:32pm UTC](https://discourse.paraview.org/t/how-to-divide-the-coordinates-scale-down-the-coordinates-of-vti-file-in-paraview/5492 "2020-10-05T13:32:06Z")

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Dear All, I have a .vti file extension which contains around 6 million datapoints. The coordinates has dimensions of 241 in x-direction, 168 in y-direction and 144 in z-direction. I need to scale down this dimension …

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## [How to save the .obj file with connectivty regions included as groups?](https://discourse.paraview.org/t/how-to-save-the-obj-file-with-connectivty-regions-included-as-groups/5497)

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**Author:** [@majksner](https://discourse.paraview.org/u/majksner)\
**Replies:** 0\
**Last updated:** [October 5, 2020, 1:28pm UTC](https://discourse.paraview.org/t/how-to-save-the-obj-file-with-connectivty-regions-included-as-groups/5497 "2020-10-05T13:28:08Z")

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Is there a way to save regions data as groups in .obj file after running connectivity filter. For example, I would like .obj file to looks like this if possible: g region0 v -0.001809 -0.000717 -0.000283 v -0.001816 -0…

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## [Cannot open fileseries in ParaView 5.4.1](https://discourse.paraview.org/t/cannot-open-fileseries-in-paraview-5-4-1/5493)

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**Author:** [@Oier\_Arcelus](https://discourse.paraview.org/u/Oier_Arcelus)\
**Replies:** 0\
**Last updated:** [October 5, 2020, 7:56am UTC](https://discourse.paraview.org/t/cannot-open-fileseries-in-paraview-5-4-1/5493 "2020-10-05T07:56:12Z")

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Dear All, I have a fileseries for a lammps data file. When trying to open them I selected File/Open and I see my lammps .dum fileseries with ‘Type: Group’. I can select each individual dump file within this group. But I…

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## [Paraview Export to csv alignment error](https://discourse.paraview.org/t/paraview-export-to-csv-alignment-error/5491)

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**Author:** [@rasunag27](https://discourse.paraview.org/u/rasunag27)\
**Replies:** 0\
**Last updated:** [October 5, 2020, 6:20am UTC](https://discourse.paraview.org/t/paraview-export-to-csv-alignment-error/5491 "2020-10-05T06:20:41Z")

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Dear All, I have an issue related to exporttocsv option in paraview. I have a .vti file extension which contains around 6 million datapoints. I need the coordinates of these datapoints to be exported in a csv file. …

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## [plotting line from csv file](https://discourse.paraview.org/t/plotting-line-from-csv-file/5469)

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**Author:** [@MoRaafat](https://discourse.paraview.org/u/MoRaafat)\
**Replies:** 14\
**Last updated:** [October 4, 2020, 7:33pm UTC](https://discourse.paraview.org/t/plotting-line-from-csv-file/5469 "2020-10-04T19:33:09Z")

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Hi all, i would like to ask about plotting line from csv file. the csv file contains two columns, one for the z-axis and the other for the velocity. i tried to plot the line chart view, but at setting z to be the x arra…

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## [Making interactive windows and selecting data using Python](https://discourse.paraview.org/t/making-interactive-windows-and-selecting-data-using-python/5481)

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**Author:** [@Amin\_Seifinia](https://discourse.paraview.org/u/Amin_Seifinia)\
**Replies:** 0\
**Last updated:** [October 3, 2020, 9:18am UTC](https://discourse.paraview.org/t/making-interactive-windows-and-selecting-data-using-python/5481 "2020-10-03T09:18:14Z")

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Hello, thank you in advance for viewing this thread. I need to write a program to use the Python interface for Paraview to display STL models and select certain faces on it. I have learned how to import my STL model usi…

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## [optimize GatherInformation?](https://discourse.paraview.org/t/optimize-gatherinformation/5424)

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**Author:** [@Dave\_DeMarle](https://discourse.paraview.org/u/Dave_DeMarle)\
**Replies:** 2\
**Last updated:** [October 2, 2020, 3:47pm UTC](https://discourse.paraview.org/t/optimize-gatherinformation/5424 "2020-10-02T15:47:05Z")

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I am generating some large volumes with fast uniform grid and the generation time, especially with SMP, is fine but the meta data gathering time is pretty bad, as in 4x longer than the data generation time in the example…

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## [Merge arrays from vtk Point Data.](https://discourse.paraview.org/t/merge-arrays-from-vtk-point-data/5476)

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**Author:** [@Oier\_Arcelus](https://discourse.paraview.org/u/Oier_Arcelus)\
**Replies:** 1\
**Last updated:** [October 2, 2020, 1:34pm UTC](https://discourse.paraview.org/t/merge-arrays-from-vtk-point-data/5476 "2020-10-02T13:34:02Z")

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Dear Forum, I have a vtkPointData object with 5 arrays. Array 0 name = id Array 1 name = type Array 2 name = c\_q\[1-3\] Array 3 name = c\_q\[4-6\] Array 4 name = c\_q\[7\] I would like to merge the last two arrays such th…

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## [Paraview 5.8 segmentation fault at start on CentOS 7 only after building OpenFOAM-v2006](https://discourse.paraview.org/t/paraview-5-8-segmentation-fault-at-start-on-centos-7-only-after-building-openfoam-v2006/5464)

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**Author:** [@Root-voidX](https://discourse.paraview.org/u/Root-voidX)\
**Replies:** 11\
**Last updated:** [October 2, 2020, 11:36am UTC](https://discourse.paraview.org/t/paraview-5-8-segmentation-fault-at-start-on-centos-7-only-after-building-openfoam-v2006/5464 "2020-10-02T11:36:27Z")

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Hello everyone, I hope everyone is staying safe and keeping well. So I started facing this issue recently. I am working wirh CentOS 7 running inside vmware on windows 10. I’m running centOS because many commercial simu…

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## [paraview.simple: get points coordinates from a slice](https://discourse.paraview.org/t/paraview-simple-get-points-coordinates-from-a-slice/5438)

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**Author:** [@ragloo](https://discourse.paraview.org/u/ragloo)\
**Replies:** 2\
**Last updated:** [October 1, 2020, 8:03pm UTC](https://discourse.paraview.org/t/paraview-simple-get-points-coordinates-from-a-slice/5438 "2020-10-01T20:03:09Z")

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Hello, I’m trying to obtain the points coordinates of a slice filter from OpenFOAM data without luck. Here what I’ve tried so far Extract data from a plane example (file is also attached) test\_mpl.py (2.0 KB) import o…

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## [Attach debugger to pvpython](https://discourse.paraview.org/t/attach-debugger-to-pvpython/3948)

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**Author:** [@CapLek](https://discourse.paraview.org/u/CapLek)\
**Replies:** 2\
**Last updated:** [October 1, 2020, 2:08pm UTC](https://discourse.paraview.org/t/attach-debugger-to-pvpython/3948 "2020-10-01T14:08:03Z")

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I need to debug some python scripts run under pvpython process but have no luck in attaching the debugger. Tried to attach through PyCharm and Microsoft VS Code IDEs. Could anyone share some experience on how to debug py…

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## [how to debug a python script](https://discourse.paraview.org/t/how-to-debug-a-python-script/688)

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**Author:** [@wascott](https://discourse.paraview.org/u/wascott)\
**Replies:** 3\
**Last updated:** [October 1, 2020, 2:07pm UTC](https://discourse.paraview.org/t/how-to-debug-a-python-script/688 "2020-10-01T14:07:48Z")

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A user asked how to debug Python scripts. This is after said scripts have been made using the trace recorder (Tools/ Start Trace and Tools/ Stop Trace), and are being modified. Here is Cory’s reply: The first thing to…

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## [Rendering a few Lines takes an unreasonable amount of memory](https://discourse.paraview.org/t/rendering-a-few-lines-takes-an-unreasonable-amount-of-memory/667)

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**Author:** [@Massimiliano\_Leoni](https://discourse.paraview.org/u/Massimiliano_Leoni)\
**Replies:** 6\
**Last updated:** [October 1, 2020, 1:53pm UTC](https://discourse.paraview.org/t/rendering-a-few-lines-takes-an-unreasonable-amount-of-memory/667 "2020-10-01T13:53:46Z")

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Hello everyone, I ran into this issue while trying to plot a number of segments in Paraview: it needs much more memory than I was expecting. Consider this script as a MWE: from random import uniform for i in range(600…

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## [How to load external material for pathtracer from python](https://discourse.paraview.org/t/how-to-load-external-material-for-pathtracer-from-python/5426)

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**Author:** [@pcrepier](https://discourse.paraview.org/u/pcrepier)\
**Replies:** 4\
**Last updated:** [September 30, 2020, 1:56pm UTC](https://discourse.paraview.org/t/how-to-load-external-material-for-pathtracer-from-python/5426 "2020-09-30T13:56:51Z")

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Hi Everyone, I while back I read on one of the threads that materials could be imported from python using that feature: materialLibrary1 = GetMaterialLibrary() materialLibrary1.LoadMaterials = \<file\> I tried providing…

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## [Set same legend for multiple views once](https://discourse.paraview.org/t/set-same-legend-for-multiple-views-once/5450)

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**Author:** [@bergt](https://discourse.paraview.org/u/bergt)\
**Replies:** 7\
**Last updated:** [September 30, 2020, 9:34am UTC](https://discourse.paraview.org/t/set-same-legend-for-multiple-views-once/5450 "2020-09-30T09:34:50Z")

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Hi, My problem is that I have a lot of outputs (actually a set of outputs (time serie)) and I want to know if there is a easy way to set the limits and style to the legend for all outputs at once? I know how to do it…

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## [Problem with clip in Paraview 5.8.0](https://discourse.paraview.org/t/problem-with-clip-in-paraview-5-8-0/5371)

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**Author:** [@Naeeme.dmo](https://discourse.paraview.org/u/Naeeme.dmo)\
**Replies:** 11\
**Last updated:** [September 29, 2020, 11:37am UTC](https://discourse.paraview.org/t/problem-with-clip-in-paraview-5-8-0/5371 "2020-09-29T11:37:11Z")

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Hi, I have a script with a simple clip “Box” definition in pvpython which works fine on paraview 5.5. I have written compatibility commands on top of my script as defined below: paraview.compatibility.major = 5 paravi…

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## [Minor typos in ParaView docs - who should I send them to?](https://discourse.paraview.org/t/minor-typos-in-paraview-docs-who-should-i-send-them-to/5437)

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**Author:** [@WhosYourData](https://discourse.paraview.org/u/WhosYourData)\
**Replies:** 5\
**Last updated:** [September 29, 2020, 10:06am UTC](https://discourse.paraview.org/t/minor-typos-in-paraview-docs-who-should-i-send-them-to/5437 "2020-09-29T10:06:28Z")

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Hi folks I’ve been working my way through the (excellent) ParaView Tutorial & ParaView Guide PDFs & have noticed a few dozen minor typos. Anyone know who I should send them to? Or are these open source docs that users c…

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## [Skybox BackgroundNorth not alterable?](https://discourse.paraview.org/t/skybox-backgroundnorth-not-alterable/5443)

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**Author:** [@Zetison](https://discourse.paraview.org/u/Zetison)\
**Replies:** 1\
**Last updated:** [September 29, 2020, 8:31am UTC](https://discourse.paraview.org/t/skybox-backgroundnorth-not-alterable/5443 "2020-09-29T08:31:18Z")

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I do not seem to get the renderView1.BackgroundNorth option to work. North seems to be pointed at by the y-axis (default). Does anyone spot an error? Or is it a bug? (I use ParaView 5.8.0 on Ubuntu 20.04) The following…

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## [Trouble with volume rendering (Paraview User Guide Programmable Source Example)](https://discourse.paraview.org/t/trouble-with-volume-rendering-paraview-user-guide-programmable-source-example/5337)

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**Author:** [@Mohamed\_Abdelkhalek](https://discourse.paraview.org/u/Mohamed_Abdelkhalek)\
**Replies:** 7\
**Last updated:** [September 29, 2020, 7:10am UTC](https://discourse.paraview.org/t/trouble-with-volume-rendering-paraview-user-guide-programmable-source-example/5337 "2020-09-29T07:10:16Z")

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https://docs.paraview.org/en/latest/ReferenceManual/pythonProgrammableFilter.html?highlight=programmable%20source#fig-readbinarydata Hello, I am trying to run this example (in link) of reading a 3D image as a programma…

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## [what happened to XDMF?](https://discourse.paraview.org/t/what-happened-to-xdmf/5444)

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**Author:** [@pcosta](https://discourse.paraview.org/u/pcosta)\
**Replies:** 0\
**Last updated:** [September 28, 2020, 10:54pm UTC](https://discourse.paraview.org/t/what-happened-to-xdmf/5444 "2020-09-28T22:54:18Z")

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Hello everyone, I am new to this forum, although I have been using paraview for a long time! I really like the xdmf file format, it allows me to read the raw binary data from my HPC applications, using a single metadat…

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## [VTU file format](https://discourse.paraview.org/t/vtu-file-format/5429)

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**Author:** [@Victor\_Saouma](https://discourse.paraview.org/u/Victor_Saouma)\
**Replies:** 5\
**Last updated:** [September 28, 2020, 7:28pm UTC](https://discourse.paraview.org/t/vtu-file-format/5429 "2020-09-28T19:28:14Z")

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I managed to write a finite element post-processor with vtk, however, it is my understanding that: Vtk is obsolete, and better to use vtu. I ould not find a documentation for file format for vtu as this one for vtk I…

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## [Access data arrays in a python code with paraview.simple](https://discourse.paraview.org/t/access-data-arrays-in-a-python-code-with-paraview-simple/5418)

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**Author:** [@Sandeep\_Jella](https://discourse.paraview.org/u/Sandeep_Jella)\
**Replies:** 5\
**Last updated:** [September 28, 2020, 5:05pm UTC](https://discourse.paraview.org/t/access-data-arrays-in-a-python-code-with-paraview-simple/5418 "2020-09-28T17:05:43Z")

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Hello, I’d like my python code to access data arrays from a multiblock dataset I read into Paraview (Ensight) via paraview.simple I want to run some math on these arrays using my python code and save the output back in…

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## [A problem I encountered when using parallel rendering](https://discourse.paraview.org/t/a-problem-i-encountered-when-using-parallel-rendering/5403)

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**Author:** [@jone](https://discourse.paraview.org/u/jone)\
**Replies:** 18\
**Last updated:** [September 28, 2020, 1:19pm UTC](https://discourse.paraview.org/t/a-problem-i-encountered-when-using-parallel-rendering/5403 "2020-09-28T13:19:57Z")

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I have set up two machines as a remote server,and their memory has 8G.The total memory of the server as I understand it should now be 16G.But when I use a client on another machine to connect to the server, I found that …

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## [I have several bubbles and how to find the bounds Xmin and Xmax of one of them If I know the coordinate a point belonging to the bubble?](https://discourse.paraview.org/t/i-have-several-bubbles-and-how-to-find-the-bounds-xmin-and-xmax-of-one-of-them-if-i-know-the-coordinate-a-point-belonging-to-the-bubble/5439)

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**Author:** [@sharaborin](https://discourse.paraview.org/u/sharaborin)\
**Replies:** 1\
**Last updated:** [September 28, 2020, 12:40pm UTC](https://discourse.paraview.org/t/i-have-several-bubbles-and-how-to-find-the-bounds-xmin-and-xmax-of-one-of-them-if-i-know-the-coordinate-a-point-belonging-to-the-bubble/5439 "2020-09-28T12:40:56Z")

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Dear All, I am trying to find the range Xmin and Xmax coordinates of a bubble. The problem is “I have several bubbles: one big and several super small bubbles”. When I try to call bounds = contour1.GetDataInformation()…

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## [An error occurred while a client was connecting to the server](https://discourse.paraview.org/t/an-error-occurred-while-a-client-was-connecting-to-the-server/5434)

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**Author:** [@jone](https://discourse.paraview.org/u/jone)\
**Replies:** 4\
**Last updated:** [September 28, 2020, 7:40am UTC](https://discourse.paraview.org/t/an-error-occurred-while-a-client-was-connecting-to-the-server/5434 "2020-09-28T07:40:40Z")

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I found my server Xorg running, and DISPLAY=：0 Is there any other way to solve this problem?

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## [Vorticity contour for falling sphere?](https://discourse.paraview.org/t/vorticity-contour-for-falling-sphere/5404)

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**Author:** [@govind\_sharma](https://discourse.paraview.org/u/govind_sharma)\
**Replies:** 7\
**Last updated:** [September 28, 2020, 7:31am UTC](https://discourse.paraview.org/t/vorticity-contour-for-falling-sphere/5404 "2020-09-28T07:31:28Z")

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How do I plot vorticity contours for a falling sphere in fluid which is initially quiescent.

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## [Open a Tecplot file .dat with block and cell centered formats](https://discourse.paraview.org/t/open-a-tecplot-file-dat-with-block-and-cell-centered-formats/5413)

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**Author:** [@Gianluca](https://discourse.paraview.org/u/Gianluca)\
**Replies:** 1\
**Last updated:** [September 26, 2020, 1:19pm UTC](https://discourse.paraview.org/t/open-a-tecplot-file-dat-with-block-and-cell-centered-formats/5413 "2020-09-26T13:19:15Z")

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Hi, I am trying to open a Tecplot file .dat in attachment through ParaView 5.4.1. It is a sphere with triangular mesh and it is printed by the CFD solver with datapacing=block and with a varlocation=cellcentered formats…

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## [Show( ) compatibility issue between ParaView 5.8 and 5.6](https://discourse.paraview.org/t/show-compatibility-issue-between-paraview-5-8-and-5-6/5425)

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**Author:** [@mbotto](https://discourse.paraview.org/u/mbotto)\
**Replies:** 2\
**Last updated:** [September 26, 2020, 12:09am UTC](https://discourse.paraview.org/t/show-compatibility-issue-between-paraview-5-8-and-5-6/5425 "2020-09-26T00:09:44Z")

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Hi, I’m using ParaView 5.8.0 and 5.6.2 on Windows 10. I am making Python scripts to run on the ParaView Python Shell (which I want to be able to run with both versions 5.8 and 5.6) and I ran into an issue with compatibil…

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