# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=117

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

**Page:** 118

---

## [How to Show/Render a vtkMultiBlockDataset with the Paraview Python wrapper](https://discourse.paraview.org/t/how-to-show-render-a-vtkmultiblockdataset-with-the-paraview-python-wrapper/8968)

<div class="topic-metadata">

**Author:** [@joaomlap](https://discourse.paraview.org/u/joaomlap)\
**Replies:** 2\
**Last updated:** [February 14, 2022, 7:19pm UTC](https://discourse.paraview.org/t/how-to-show-render-a-vtkmultiblockdataset-with-the-paraview-python-wrapper/8968 "2022-02-14T19:19:34Z")

</div>

Hi, I am trying to use paraview.simple to render a vtkMultiBlockDataset. If I try to do: paraview.simple.Show(multiblock) I get the following error: RuntimeError: Cannot show a sink i.e. algorithm with no output. I…

---

## [Graphs in Paraview](https://discourse.paraview.org/t/graphs-in-paraview/8966)

<div class="topic-metadata">

**Author:** [@PALANI](https://discourse.paraview.org/u/PALANI)\
**Replies:** 1\
**Last updated:** [February 14, 2022, 9:15am UTC](https://discourse.paraview.org/t/graphs-in-paraview/8966 "2022-02-14T09:15:35Z")

</div>

Can I change the parameter in the x axis and y fpr the graphs ?

---

## [Extract value in a particular point](https://discourse.paraview.org/t/extract-value-in-a-particular-point/8965)

<div class="topic-metadata">

**Author:** [@Alberto\_Lolli](https://discourse.paraview.org/u/Alberto_Lolli)\
**Replies:** 1\
**Last updated:** [February 14, 2022, 8:07am UTC](https://discourse.paraview.org/t/extract-value-in-a-particular-point/8965 "2022-02-14T08:07:03Z")

</div>

Hi everyone, does anyone know how can I extract the value in corrispondence at the point indicated by the rule i.e. at distance 150 along y axis from the center of the sphere I attach the image shows what I mean man…

---

## [Cell Selection with Python](https://discourse.paraview.org/t/cell-selection-with-python/8964)

<div class="topic-metadata">

**Author:** [@limpideyes](https://discourse.paraview.org/u/limpideyes)\
**Replies:** 1\
**Last updated:** [February 13, 2022, 7:47pm UTC](https://discourse.paraview.org/t/cell-selection-with-python/8964 "2022-02-13T19:47:31Z")

</div>

Hello, I trying to select cells by python. I manually selected cells with the selection tools, ‘select cells on (s)’: When I traced the python script, it was shown as: SelectSurfaceCells(Rectangle=\[675, 749, 1356, …

---

## [Postprocessing the simulation output VTU file with Python](https://discourse.paraview.org/t/postprocessing-the-simulation-output-vtu-file-with-python/8960)

<div class="topic-metadata">

**Author:** [@Miraboreasau](https://discourse.paraview.org/u/Miraboreasau)\
**Replies:** 1\
**Last updated:** [February 13, 2022, 12:27pm UTC](https://discourse.paraview.org/t/postprocessing-the-simulation-output-vtu-file-with-python/8960 "2022-02-13T12:27:00Z")

</div>

Hello, I want to explore more in my VTU file (attached) besides using Paraview, I try to write a Python script (attached) to read my VTU file, like store all the results to lists, so I can do some analysis. I have tried…

---

## [programmable source for arrow](https://discourse.paraview.org/t/programmable-source-for-arrow/8961)

<div class="topic-metadata">

**Author:** [@bigfooted](https://discourse.paraview.org/u/bigfooted)\
**Replies:** 3\
**Last updated:** [February 13, 2022, 12:13pm UTC](https://discourse.paraview.org/t/programmable-source-for-arrow/8961 "2022-02-13T12:13:41Z")

</div>

Hi all! I am learning now about the use of programmable sources and programmable filters. Most examples that I found deal with manipulating point data and constructing objects from that. But how can I use a programmable…

---

## [Plotting data from Mfix file](https://discourse.paraview.org/t/plotting-data-from-mfix-file/8963)

<div class="topic-metadata">

**Author:** [@samah1995](https://discourse.paraview.org/u/samah1995)\
**Replies:** 0\
**Last updated:** [February 13, 2022, 9:59am UTC](https://discourse.paraview.org/t/plotting-data-from-mfix-file/8963 "2022-02-13T09:59:25Z")

</div>

when I plot the velocity for 2D Poiseuille flow, I get the plot as attached. how can I get it as same as the one in the mfix manual (smooth curve and direction)

---

## [(CGNS) Is it possible to load boundary patches from a CGNS file?](https://discourse.paraview.org/t/cgns-is-it-possible-to-load-boundary-patches-from-a-cgns-file/8119)

<div class="topic-metadata">

**Author:** [@SadBoySquad](https://discourse.paraview.org/u/SadBoySquad)\
**Replies:** 12\
**Last updated:** [February 11, 2022, 6:40pm UTC](https://discourse.paraview.org/t/cgns-is-it-possible-to-load-boundary-patches-from-a-cgns-file/8119 "2022-02-11T18:40:03Z")

</div>

Greetings to all people of this forum! For the past few days I have been searching for a way to display flow properties on boundary patches defined in the CGNS file, unfortunately to no avail. I found a relevant thread…

---

## [Polyhedral meshes specific visualization](https://discourse.paraview.org/t/polyhedral-meshes-specific-visualization/8957)

<div class="topic-metadata">

**Author:** [@MicK7](https://discourse.paraview.org/u/MicK7)\
**Replies:** 5\
**Last updated:** [February 11, 2022, 5:03pm UTC](https://discourse.paraview.org/t/polyhedral-meshes-specific-visualization/8957 "2022-02-11T17:03:23Z")

</div>

Hi all, I am wondering if it is possible to display “volume” of cells of a polyhedral mesh in ParaView. Moreover, is there a filter to compute the cell squish index of a polyhedral cell. (is it hidden in the mesh quali…

---

## [Improper rendering of cell centered data of multiple blocks in plot3d format](https://discourse.paraview.org/t/improper-rendering-of-cell-centered-data-of-multiple-blocks-in-plot3d-format/8959)

<div class="topic-metadata">

**Author:** [@MAGAN\_SINGH](https://discourse.paraview.org/u/MAGAN_SINGH)\
**Replies:** 8\
**Last updated:** [February 11, 2022, 1:02pm UTC](https://discourse.paraview.org/t/improper-rendering-of-cell-centered-data-of-multiple-blocks-in-plot3d-format/8959 "2022-02-11T13:02:12Z")

</div>

I have the Reynolds stress cell center data of multiple blocks in plot3d binary files. After opening files in Paraview-5.9.0, the surface rendering of data shows the partition of multiple blocks as shown in the attached …

---

## [pvpython question](https://discourse.paraview.org/t/pvpython-question/8951)

<div class="topic-metadata">

**Author:** [@callista](https://discourse.paraview.org/u/callista)\
**Replies:** 2\
**Last updated:** [February 11, 2022, 9:55am UTC](https://discourse.paraview.org/t/pvpython-question/8951 "2022-02-11T09:55:05Z")

</div>

Hello, I am trying to generalize some paraview script and I got this error. Does this mean that pvpython does not recognize my config file, is it possible at all to make something like this meaning to combine pvpython …

---

## [CGNS file with links](https://discourse.paraview.org/t/cgns-file-with-links/8358)

<div class="topic-metadata">

**Author:** [@Tim](https://discourse.paraview.org/u/Tim)\
**Replies:** 1\
**Last updated:** [February 10, 2022, 8:16pm UTC](https://discourse.paraview.org/t/cgns-file-with-links/8358 "2022-02-10T20:16:32Z")

</div>

I’m trying to import an unstructured CGNS file into ParaView. If I create this file in full the mesh loads in fine and displays some wall distance data attached to the mesh correctly. However, if I create a second file w…

---

## [Missing Points from export, is it me?](https://discourse.paraview.org/t/missing-points-from-export-is-it-me/8955)

<div class="topic-metadata">

**Author:** [@Noobie](https://discourse.paraview.org/u/Noobie)\
**Replies:** 4\
**Last updated:** [February 10, 2022, 4:56pm UTC](https://discourse.paraview.org/t/missing-points-from-export-is-it-me/8955 "2022-02-10T16:56:43Z")

</div>

Hi All, im relatively new to Paraview. I have simulated wind flow in openFOAM and opened in paraView. The visualisation is fantastic and i wanted to export glypths with the associated data for analyitical use elsewhere.…

---

## [Making a tensor from scalars](https://discourse.paraview.org/t/making-a-tensor-from-scalars/2914)

<div class="topic-metadata">

**Author:** [@Mike](https://discourse.paraview.org/u/Mike)\
**Replies:** 4\
**Last updated:** [February 10, 2022, 9:16am UTC](https://discourse.paraview.org/t/making-a-tensor-from-scalars/2914 "2022-02-10T09:16:53Z")

</div>

Dear ParaView Community, I have the components of a tensor as scalar variables, and I would like to combine them into a single tensor variable so I can use the Tensor Glyph filter. The ParaView Wiki indicates that this…

---

## [Loading tilted cartesian datasets](https://discourse.paraview.org/t/loading-tilted-cartesian-datasets/8890)

<div class="topic-metadata">

**Author:** [@popovas](https://discourse.paraview.org/u/popovas)\
**Replies:** 7\
**Last updated:** [February 10, 2022, 11:17am UTC](https://discourse.paraview.org/t/loading-tilted-cartesian-datasets/8890 "2022-02-10T11:17:54Z")

</div>

Hello, I am rather new to paraview, and I have a rather complicated challenge. I will divide this topic in three parts: (1) some background, (2) summary of data sets and (3) what I am trying to do Some background: We …

---

## [Cell Data and Point Data integration process](https://discourse.paraview.org/t/cell-data-and-point-data-integration-process/8945)

<div class="topic-metadata">

**Author:** [@Gianmarco](https://discourse.paraview.org/u/Gianmarco)\
**Replies:** 0\
**Last updated:** [February 9, 2022, 11:19pm UTC](https://discourse.paraview.org/t/cell-data-and-point-data-integration-process/8945 "2022-02-09T23:19:01Z")

</div>

Hello all, I’m struggling with Cell Data and Point Data. I made a python script to compute mass-weighted average of some varaibles over a given set of slices. It works great with an input solution with cell data, but gi…

---

## [Create ImageData](https://discourse.paraview.org/t/create-imagedata/8883)

<div class="topic-metadata">

**Author:** [@woodscn](https://discourse.paraview.org/u/woodscn)\
**Replies:** 4\
**Last updated:** [February 9, 2022, 9:57pm UTC](https://discourse.paraview.org/t/create-imagedata/8883 "2022-02-09T21:57:34Z")

</div>

I’m writing a filter that creates a 2D ImageData based on a 3D ImageData input. It seems to be working correctly, but the new structure won’t render as a surface. It looks correct as Gaussian Points. I believe I simply …

---

## [Grow selection python command / trace issue (maybe ?)](https://discourse.paraview.org/t/grow-selection-python-command-trace-issue-maybe/8908)

<div class="topic-metadata">

**Author:** [@vcn\_cfd](https://discourse.paraview.org/u/vcn_cfd)\
**Replies:** 2\
**Last updated:** [February 9, 2022, 5:30pm UTC](https://discourse.paraview.org/t/grow-selection-python-command-trace-issue-maybe/8908 "2022-02-09T17:30:13Z")

</div>

Hello, I am attempting to automate the following using a python script: \[1\] Interactive select cells on \> \[2\] grow selection ( arbitrary repetitions) \> \[3\] extract selection. I create a trace file to get the required …

---

## [In client / server mode, the paraview client does not respond after pvpython completes data operation](https://discourse.paraview.org/t/in-client-server-mode-the-paraview-client-does-not-respond-after-pvpython-completes-data-operation/8706)

<div class="topic-metadata">

**Author:** [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)\
**Replies:** 31\
**Last updated:** [February 8, 2022, 9:29pm UTC](https://discourse.paraview.org/t/in-client-server-mode-the-paraview-client-does-not-respond-after-pvpython-completes-data-operation/8706 "2022-02-08T21:29:18Z")

</div>

In client / server mode, the paraview client does not respond after pvpython completes data operation Command to start pvserver： pvserver.exe --multi-clients the information of pvserver.exe Paraview GUI connects …

---

## [Vectors in Paraview](https://discourse.paraview.org/t/vectors-in-paraview/8899)

<div class="topic-metadata">

**Author:** [@PALANI](https://discourse.paraview.org/u/PALANI)\
**Replies:** 3\
**Last updated:** [February 8, 2022, 8:58pm UTC](https://discourse.paraview.org/t/vectors-in-paraview/8899 "2022-02-08T20:58:14Z")

</div>

Hello, I want to plot the vectors like this in Paraview, how and is it possible to do so, help me out, I am a beginner in post - processing field.

---

## [Do some math on VTU file](https://discourse.paraview.org/t/do-some-math-on-vtu-file/8925)

<div class="topic-metadata">

**Author:** [@Miraboreasau](https://discourse.paraview.org/u/Miraboreasau)\
**Replies:** 5\
**Last updated:** [February 8, 2022, 4:50pm UTC](https://discourse.paraview.org/t/do-some-math-on-vtu-file/8925 "2022-02-08T16:50:27Z")

</div>

I have a VTU file like this, (too big to upload, so I copy part of it). What I used to do is use MATLAB/Python to read the value of certain DataArray, but this time, the file is encoded, what is the best way to decode it…

---

## [3D segmentation and volume quantification](https://discourse.paraview.org/t/3d-segmentation-and-volume-quantification/8928)

<div class="topic-metadata">

**Author:** [@Lan](https://discourse.paraview.org/u/Lan)\
**Replies:** 6\
**Last updated:** [February 8, 2022, 3:28pm UTC](https://discourse.paraview.org/t/3d-segmentation-and-volume-quantification/8928 "2022-02-08T15:28:16Z")

</div>

Hi, I am new user and I have a stack of TIFF images generated by neutron computed tomography. I wonder if I can segment and label different components of the 3D structure and further quantify the vloume of them separat…

---

## [Error parsing IceT flag from message](https://discourse.paraview.org/t/error-parsing-icet-flag-from-message/8930)

<div class="topic-metadata">

**Author:** [@nopech](https://discourse.paraview.org/u/nopech)\
**Replies:** 3\
**Last updated:** [February 8, 2022, 12:12pm UTC](https://discourse.paraview.org/t/error-parsing-icet-flag-from-message/8930 "2022-02-08T12:12:31Z")

</div>

Hello I built ParaView v5.10.0 from the superbuild repo with osmesa and mpi on a AlmaLinux 8 machine. The building and starting pvserver seems to work fine. However when I connect from a client to the pvserver, i get th…

---

## [Error: Visit Exception caught?](https://discourse.paraview.org/t/error-visit-exception-caught/8923)

<div class="topic-metadata">

**Author:** [@ShootingStar807](https://discourse.paraview.org/u/ShootingStar807)\
**Replies:** 3\
**Last updated:** [February 8, 2022, 8:33am UTC](https://discourse.paraview.org/t/error-visit-exception-caught/8923 "2022-02-08T08:33:10Z")

</div>

Hello! I seem to get the following error when I try to load in some of the data I am trying to view. The error doesn’t appear with some of the other data only for certain cases. Visit Exception caught ERROR: In /swbuil…

---

## ["Output messages" window stop working after running a macro that uses Matplotlib (MacOS)](https://discourse.paraview.org/t/output-messages-window-stop-working-after-running-a-macro-that-uses-matplotlib-macos/8837)

<div class="topic-metadata">

**Author:** [@Matheus\_Viana](https://discourse.paraview.org/u/Matheus_Viana)\
**Replies:** 27\
**Last updated:** [February 8, 2022, 12:21am UTC](https://discourse.paraview.org/t/output-messages-window-stop-working-after-running-a-macro-that-uses-matplotlib-macos/8837 "2022-02-08T00:21:01Z")

</div>

Hi. I have a Python macro that outputs some information about the data being visualized in the “Output Messages”. window. This macro also has a function that makes a plot using Matplotlib and saves it as a PNG file. Howe…

---

## [slice along polyline](https://discourse.paraview.org/t/slice-along-polyline/1633)

<div class="topic-metadata">

**Author:** [@marios\_geo](https://discourse.paraview.org/u/marios_geo)\
**Replies:** 8\
**Last updated:** [February 7, 2022, 7:34pm UTC](https://discourse.paraview.org/t/slice-along-polyline/1633 "2022-02-07T19:34:08Z")

</div>

Hi, I am new to paraview and trying to figure things out. A have a VTK file that represents volumentirc data. I want to slice the volume, alony y-axis, given some points (xyz) that are on z=0 plane. I loaded a txt fil…

---

## [Will Paragon open a "Surfer" Software file?](https://discourse.paraview.org/t/will-paragon-open-a-surfer-software-file/8922)

<div class="topic-metadata">

**Author:** [@neal](https://discourse.paraview.org/u/neal)\
**Replies:** 1\
**Last updated:** [February 7, 2022, 7:21pm UTC](https://discourse.paraview.org/t/will-paragon-open-a-surfer-software-file/8922 "2022-02-07T19:21:45Z")

</div>

I use Golden Software “Surfer” and have some 3D surface plots…has anyone had success with opening a Surfer file with ParaView ? Thanks, Neal

---

## [GUI Tkinter PyQt5 Paraview](https://discourse.paraview.org/t/gui-tkinter-pyqt5-paraview/8920)

<div class="topic-metadata">

**Author:** [@Rian\_S](https://discourse.paraview.org/u/Rian_S)\
**Replies:** 0\
**Last updated:** [February 7, 2022, 12:23pm UTC](https://discourse.paraview.org/t/gui-tkinter-pyqt5-paraview/8920 "2022-02-07T12:23:15Z")

</div>

Hello, I am new in Paraview and I really don’t know how I can integrate Tkinter or PyQt5 or another GUI, to get the path of a file in my Paraview Macro, when I chose the file. I look at the way from another topic, but I…

---

## [cannot compile iparaview-kernel](https://discourse.paraview.org/t/cannot-compile-iparaview-kernel/8902)

<div class="topic-metadata">

**Author:** [@jfavre](https://discourse.paraview.org/u/jfavre)\
**Replies:** 9\
**Last updated:** [February 7, 2022, 10:25am UTC](https://discourse.paraview.org/t/cannot-compile-iparaview-kernel/8902 "2022-02-07T10:25:17Z")

</div>

I have PV5.10.0 compiled from source, with Qt for my laptop. I cannot configure iparaview-kernel: CMake Error at /local/apps/ParaView/5.10/lib/cmake/paraview-5.10/paraview-config.cmake:163 (list): list sub-command REMO…

---

## [Export Paraview's texture for Cinema 4D](https://discourse.paraview.org/t/export-paraviews-texture-for-cinema-4d/8915)

<div class="topic-metadata">

**Author:** [@Mathieu\_Soularue](https://discourse.paraview.org/u/Mathieu_Soularue)\
**Replies:** 1\
**Last updated:** [February 7, 2022, 9:32am UTC](https://discourse.paraview.org/t/export-paraviews-texture-for-cinema-4d/8915 "2022-02-07T09:32:32Z")

</div>

Hi, I’m working on an important project and i would like to export Paraview’s texture of a bike to use it as a tewture in cinema 4D. I really haven’t found any answers yet…

[Previous page](https://discourse.paraview.org/c/paraview-support/7.md?page=116)

[Next page](https://discourse.paraview.org/c/paraview-support/7.md?page=118)