# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=220

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**Page:** 221

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## [OpenGL drivers on the server side don't support required OpenGL features for basic rendering](https://discourse.paraview.org/t/opengl-drivers-on-the-server-side-dont-support-required-opengl-features-for-basic-rendering/1072)

<div class="topic-metadata">

**Author:** [@hconel](https://discourse.paraview.org/u/hconel)\
**Replies:** 0\
**Last updated:** [December 20, 2018, 5:21pm UTC](https://discourse.paraview.org/t/opengl-drivers-on-the-server-side-dont-support-required-opengl-features-for-basic-rendering/1072 "2018-12-20T17:21:15Z")

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Hello, I am trying to connect to a remote server and I get the following error in the terminal: ERROR: In /cfd/honel/OpenFOAM/ThirdParty-5.x/ParaView-5.4.0/VTK/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx, line 831 vtkXO…

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## [Screenshot from pvpython is... weird](https://discourse.paraview.org/t/screenshot-from-pvpython-is-weird/1066)

<div class="topic-metadata">

**Author:** [@benoitpaillard](https://discourse.paraview.org/u/benoitpaillard)\
**Replies:** 3\
**Last updated:** [December 20, 2018, 1:48am UTC](https://discourse.paraview.org/t/screenshot-from-pvpython-is-weird/1066 "2018-12-20T01:48:50Z")

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Hi all, I’m usually using pvpython at some point in a study, when I need to capture many identical screenshots from many parametrized cases. I recently started getting this kind of issues : You can notice there are …

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## [White background/font color bug?](https://discourse.paraview.org/t/white-background-font-color-bug/1046)

<div class="topic-metadata">

**Author:** [@RED](https://discourse.paraview.org/u/RED)\
**Replies:** 2\
**Last updated:** [December 19, 2018, 10:18pm UTC](https://discourse.paraview.org/t/white-background-font-color-bug/1046 "2018-12-19T22:18:50Z")

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I ran into the following problem today: If a time annotation is rendered in white font color in a render window and the image is saved with the white background option, the font is turned into black at save time. I gue…

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## [Changing pvd file after loading](https://discourse.paraview.org/t/changing-pvd-file-after-loading/895)

<div class="topic-metadata">

**Author:** [@Massimiliano\_Leoni](https://discourse.paraview.org/u/Massimiliano_Leoni)\
**Replies:** 5\
**Last updated:** [December 18, 2018, 10:28am UTC](https://discourse.paraview.org/t/changing-pvd-file-after-loading/895 "2018-12-18T10:28:53Z")

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Hi all, I remember that a few versions ago, when loading a pvd file, in the Properties panel I had the possibility to change the path of the pvd file, which was very very convenient as it allowed me to seamlessly switch …

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## [Programmable filter using paraview](https://discourse.paraview.org/t/programmable-filter-using-paraview/1054)

<div class="topic-metadata">

**Author:** [@fedecaccia](https://discourse.paraview.org/u/fedecaccia)\
**Replies:** 1\
**Last updated:** [December 17, 2018, 6:08pm UTC](https://discourse.paraview.org/t/programmable-filter-using-paraview/1054 "2018-12-17T18:08:18Z")

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I have a surface with field values (.vtk), which is an output of an openfoam postprocessing (I have made it using a cutting plane on my geometry). I need to calculate the average field value on the surface and I don’t kn…

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## [trouble transforming texture mapped objects](https://discourse.paraview.org/t/trouble-transforming-texture-mapped-objects/1038)

<div class="topic-metadata">

**Author:** [@insley](https://discourse.paraview.org/u/insley)\
**Replies:** 3\
**Last updated:** [December 17, 2018, 2:39pm UTC](https://discourse.paraview.org/t/trouble-transforming-texture-mapped-objects/1038 "2018-12-17T14:39:39Z")

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Hi, I’m not sure whether I’m doing something wrong, this is expected behavior, or a bug. I create a Sphere source Apply TextureMapToSphere Load an image to use as texture Things look as expected. If I then apply a …

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## [Working with multi-block/multi-piece data sets](https://discourse.paraview.org/t/working-with-multi-block-multi-piece-data-sets/1050)

<div class="topic-metadata">

**Author:** [@olesenm](https://discourse.paraview.org/u/olesenm)\
**Replies:** 2\
**Last updated:** [December 17, 2018, 12:57pm UTC](https://discourse.paraview.org/t/working-with-multi-block-multi-piece-data-sets/1050 "2018-12-17T12:57:41Z")

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I’m fiddling with a plugin and trying to determine a quick test for the existence/non-existence of a particular cell-data array, or point-data array and its overall range. I was hoping for a min/max vtkAlgorithm or equiv…

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## [paraview 3d interpolation](https://discourse.paraview.org/t/paraview-3d-interpolation/963)

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**Author:** [@fanfan](https://discourse.paraview.org/u/fanfan)\
**Replies:** 2\
**Last updated:** [December 17, 2018, 9:21am UTC](https://discourse.paraview.org/t/paraview-3d-interpolation/963 "2018-12-17T09:21:24Z")

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Hi I am able to view a vtk file imported from gtass gis into paraview. Instead of interpolating a dataset of 180k points in a different software, i am wondering if the interpolation can be done directly in paraview. th…

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## [Colorbar/annotations font size discrepancy](https://discourse.paraview.org/t/colorbar-annotations-font-size-discrepancy/1047)

<div class="topic-metadata">

**Author:** [@RED](https://discourse.paraview.org/u/RED)\
**Replies:** 0\
**Last updated:** [December 14, 2018, 9:08pm UTC](https://discourse.paraview.org/t/colorbar-annotations-font-size-discrepancy/1047 "2018-12-14T21:08:13Z")

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I’ve noticed that font size used in text annotations and that in colormaps are not coherent, assuming they are based on the same units, i.e. a text annotation with font size 16 looks way larger than colorbar text at the …

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## [Paraview does not render a vtkImageData object generated by a vtkpythonalgorithmbase plugin](https://discourse.paraview.org/t/paraview-does-not-render-a-vtkimagedata-object-generated-by-a-vtkpythonalgorithmbase-plugin/1044)

<div class="topic-metadata">

**Author:** [@Jlamaro7](https://discourse.paraview.org/u/Jlamaro7)\
**Replies:** 0\
**Last updated:** [December 14, 2018, 5:48pm UTC](https://discourse.paraview.org/t/paraview-does-not-render-a-vtkimagedata-object-generated-by-a-vtkpythonalgorithmbase-plugin/1044 "2018-12-14T17:48:52Z")

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Hi!! I am a newbie who is trying to implement a plugin using vtkPythonAlgorithmBase. I was able to implement a point volume interpolator using vtkPointInterpolator (I am trying to do it without using the paraview.simple…

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## [Windows and netCDF CF Reader ...](https://discourse.paraview.org/t/windows-and-netcdf-cf-reader/1036)

<div class="topic-metadata">

**Author:** [@Niklas](https://discourse.paraview.org/u/Niklas)\
**Replies:** 1\
**Last updated:** [December 14, 2018, 3:05pm UTC](https://discourse.paraview.org/t/windows-and-netcdf-cf-reader/1036 "2018-12-14T15:05:03Z")

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Hi, I have a netCDF problem with the recent ParaView binaries for Windows. Currently, I use the nightly versions, and when opening a regular netCDF CF file, an error is shown that vtkVisit… is not able to read the data,…

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## [Have ParaView use the Active Scalars as the Display Coloring](https://discourse.paraview.org/t/have-paraview-use-the-active-scalars-as-the-display-coloring/1037)

<div class="topic-metadata">

**Author:** [@banesullivan](https://discourse.paraview.org/u/banesullivan)\
**Replies:** 0\
**Last updated:** [December 13, 2018, 4:07pm UTC](https://discourse.paraview.org/t/have-paraview-use-the-active-scalars-as-the-display-coloring/1037 "2018-12-13T16:07:25Z")

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I am creating Python based file reader algorithms and filters and I am curious how I could properly set the Active Scalars array on the output data object so that ParaView will automaticcaly color by that array. I’ve don…

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## [Operations on multi-block dataset with Programmable Filter](https://discourse.paraview.org/t/operations-on-multi-block-dataset-with-programmable-filter/1027)

<div class="topic-metadata">

**Author:** [@pcrepier](https://discourse.paraview.org/u/pcrepier)\
**Replies:** 6\
**Last updated:** [December 13, 2018, 3:44pm UTC](https://discourse.paraview.org/t/operations-on-multi-block-dataset-with-programmable-filter/1027 "2018-12-13T15:44:58Z")

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Hi Everyone, A post-processing script I made redefines a variable that may be wrongly defined by my solver. However, this value depends on an other scalar also present in the dataset. For example: if scalar2 \< 0.8: …

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## [Client / Server configuration](https://discourse.paraview.org/t/client-server-configuration/69)

<div class="topic-metadata">

**Author:** [@jam68](https://discourse.paraview.org/u/jam68)\
**Replies:** 8\
**Last updated:** [December 13, 2018, 3:39pm UTC](https://discourse.paraview.org/t/client-server-configuration/69 "2018-12-13T15:39:58Z")

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Hello, I am using ParaView with OpenFOAM. I have just changed over to using OpenFOAM in a Docker container. My configuration is a remote server on which I have OpenFOAM running in Docker. I am running pvserver in the c…

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## [Merge Blocks filter not working for XDMF multiblock unstructured grids in 5.6.0](https://discourse.paraview.org/t/merge-blocks-filter-not-working-for-xdmf-multiblock-unstructured-grids-in-5-6-0/1002)

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**Author:** [@asmith](https://discourse.paraview.org/u/asmith)\
**Replies:** 4\
**Last updated:** [December 12, 2018, 5:29pm UTC](https://discourse.paraview.org/t/merge-blocks-filter-not-working-for-xdmf-multiblock-unstructured-grids-in-5-6-0/1002 "2018-12-12T17:29:15Z")

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I have an XDMF multiblock unstructured grid opened with the ParaView 5.6.0 binaries. After taking a slice I get the following: I attempt a Merge Blocks filter and get the following: Can anyone else confirm this be…

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## [Problem with streamline animation](https://discourse.paraview.org/t/problem-with-streamline-animation/1024)

<div class="topic-metadata">

**Author:** [@lucaopbg](https://discourse.paraview.org/u/lucaopbg)\
**Replies:** 4\
**Last updated:** [December 12, 2018, 3:17pm UTC](https://discourse.paraview.org/t/problem-with-streamline-animation/1024 "2018-12-12T15:17:09Z")

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Hi everyone. I’m a new user of Paraview. I created a CFD simulation with the SimVascular (www.simvascular.org) software. Now I have imported my project \*.vtu in Paraview but I just can not understand how to get an ani…

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## [Surface and line integrals on user-defined ParaView planes and lines](https://discourse.paraview.org/t/surface-and-line-integrals-on-user-defined-paraview-planes-and-lines/1029)

<div class="topic-metadata">

**Author:** [@AlinS](https://discourse.paraview.org/u/AlinS)\
**Replies:** 1\
**Last updated:** [December 12, 2018, 6:23am UTC](https://discourse.paraview.org/t/surface-and-line-integrals-on-user-defined-paraview-planes-and-lines/1029 "2018-12-12T06:23:49Z")

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Hi, I’m trying to find out how can I realize surface and line integrals in a 3D model on surfaces and lines defined in ParaView by the user. Surface integrals I wasn’t able to find a way to define a surface/plane in …

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## [Streamlines on sphere surface](https://discourse.paraview.org/t/streamlines-on-sphere-surface/1014)

<div class="topic-metadata">

**Author:** [@liangwang0734](https://discourse.paraview.org/u/liangwang0734)\
**Replies:** 1\
**Last updated:** [December 11, 2018, 1:45pm UTC](https://discourse.paraview.org/t/streamlines-on-sphere-surface/1014 "2018-12-11T13:45:07Z")

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Hi, what is the standard procedure to plot streamlines on the surface of an object, say, a sphere? Input is a 3d vector. I would like the map it onto the surface of a sphere and plot its contour/streamlines. Examples: …

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## [clean Paraview build link for plugin development](https://discourse.paraview.org/t/clean-paraview-build-link-for-plugin-development/235)

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**Author:** [@wil](https://discourse.paraview.org/u/wil)\
**Replies:** 12\
**Last updated:** [December 11, 2018, 1:37am UTC](https://discourse.paraview.org/t/clean-paraview-build-link-for-plugin-development/235 "2018-12-11T01:37:59Z")

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Could anyone give a link to a clean Paraview build (and is depdencies : vtk, qt) working for plugin development ? (builded with ninja or visual studio)

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## [Threshold filter having problems when auto convert is on](https://discourse.paraview.org/t/threshold-filter-having-problems-when-auto-convert-is-on/1025)

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**Author:** [@Lukasz](https://discourse.paraview.org/u/Lukasz)\
**Replies:** 0\
**Last updated:** [December 10, 2018, 5:32pm UTC](https://discourse.paraview.org/t/threshold-filter-having-problems-when-auto-convert-is-on/1025 "2018-12-10T17:32:45Z")

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When “Auto Convert Properties” is turned on and you have an input file with several cell-based variables, the threshold filter min/max sliders are stuck on the first variable’s limits, i.e. it is only possible to thresho…

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## [Paraview GPU utilization](https://discourse.paraview.org/t/paraview-gpu-utilization/1020)

<div class="topic-metadata">

**Author:** [@darkhelmet9](https://discourse.paraview.org/u/darkhelmet9)\
**Replies:** 0\
**Last updated:** [December 7, 2018, 5:59pm UTC](https://discourse.paraview.org/t/paraview-gpu-utilization/1020 "2018-12-07T17:59:42Z")

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Hi, I’m having some difficulty using Paraview on my Windows desktop. I’ve noticed that while I’m using it, my GPU is being hardly used for rendering tasks, while my CPU usage is spiking. Is there something I have to do …

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## [Segmentation Based on Volume Size](https://discourse.paraview.org/t/segmentation-based-on-volume-size/1018)

<div class="topic-metadata">

**Author:** [@amchevannes](https://discourse.paraview.org/u/amchevannes)\
**Replies:** 1\
**Last updated:** [December 7, 2018, 3:54pm UTC](https://discourse.paraview.org/t/segmentation-based-on-volume-size/1018 "2018-12-07T15:54:59Z")

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I am working on a project to visualize the vessel structure of a heart from tiff files of microCT data. We are trying to exclude the large ventricles from the visualization, but the segmentation process has been difficul…

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## [Calculator using python math functions](https://discourse.paraview.org/t/calculator-using-python-math-functions/1004)

<div class="topic-metadata">

**Author:** [@aharvey](https://discourse.paraview.org/u/aharvey)\
**Replies:** 4\
**Last updated:** [December 6, 2018, 1:27pm UTC](https://discourse.paraview.org/t/calculator-using-python-math-functions/1004 "2018-12-06T13:27:03Z")

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I need to calculate a new variable in my dataset, but I need access to math functions that aren’t available in the calculator filter. Specifically, I want to use the python math.erf function. Is there any way I can ac…

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## [sudo needed to run paraview](https://discourse.paraview.org/t/sudo-needed-to-run-paraview/1007)

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**Author:** [@Ron](https://discourse.paraview.org/u/Ron)\
**Replies:** 2\
**Last updated:** [December 6, 2018, 6:13am UTC](https://discourse.paraview.org/t/sudo-needed-to-run-paraview/1007 "2018-12-06T06:13:40Z")

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I downloaded OpenFOAM-v6 and with it came ParaView 5.4.1 64-bit. When using paraFoam or paraview, it immediately crashes with the only message at the terminal: Segmentation fault (core dumped) However, if I enter: sudo…

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## [Sub-element isosurfaces for VTK unstructured grid](https://discourse.paraview.org/t/sub-element-isosurfaces-for-vtk-unstructured-grid/999)

<div class="topic-metadata">

**Author:** [@AnderBiguri](https://discourse.paraview.org/u/AnderBiguri)\
**Replies:** 2\
**Last updated:** [December 4, 2018, 6:00pm UTC](https://discourse.paraview.org/t/sub-element-isosurfaces-for-vtk-unstructured-grid/999 "2018-12-04T18:00:33Z")

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Hi, I have a VTK unstructured grid with scalar values and I’d like to obtain an isosurface for it. However, when I use the threshold filter, the result is not “sub-element” as in the elements are either in or out, but t…

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## [OSPRay scaling points](https://discourse.paraview.org/t/ospray-scaling-points/992)

<div class="topic-metadata">

**Author:** [@Randy\_Heiland](https://discourse.paraview.org/u/Randy_Heiland)\
**Replies:** 16\
**Last updated:** [December 4, 2018, 4:58pm UTC](https://discourse.paraview.org/t/ospray-scaling-points/992 "2018-12-04T16:58:40Z")

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PV 5.6.0 I’m trying to use OSPRay to render points as spheres (not 3D glyphs), scale them with a given scalar field, and then apply an additional, single value scale factor to that. It’s this last bit I cannot seem to d…

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## [Extract surfaces with Programmable Filter](https://discourse.paraview.org/t/extract-surfaces-with-programmable-filter/998)

<div class="topic-metadata">

**Author:** [@Hamburgerfinger](https://discourse.paraview.org/u/Hamburgerfinger)\
**Replies:** 0\
**Last updated:** [December 4, 2018, 4:20pm UTC](https://discourse.paraview.org/t/extract-surfaces-with-programmable-filter/998 "2018-12-04T16:20:01Z")

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Hi, I have a tetrahedral mesh in vtk unstructured grid format, with different regions defined by cell scalars. I want to apply a threshold filter to isolate an individual component and then apply the extract surface fi…

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## [PV4Readers don't compile correctly into OpenFOAM](https://discourse.paraview.org/t/pv4readers-dont-compile-correctly-into-openfoam/902)

<div class="topic-metadata">

**Author:** [@Spurius](https://discourse.paraview.org/u/Spurius)\
**Replies:** 2\
**Last updated:** [December 4, 2018, 11:00am UTC](https://discourse.paraview.org/t/pv4readers-dont-compile-correctly-into-openfoam/902 "2018-12-04T11:00:15Z")

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Greetings, I am trying to do some OpenFOAM simulations with the assistance of ParaView. Beforehand: I am new to all of these applications, so excuse me, please, if my terminology (and knowledge) isn’t always on point O…

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## [Error in read hdf5 1.10](https://discourse.paraview.org/t/error-in-read-hdf5-1-10/979)

<div class="topic-metadata">

**Author:** [@conaneliza](https://discourse.paraview.org/u/conaneliza)\
**Replies:** 3\
**Last updated:** [December 3, 2018, 4:31pm UTC](https://discourse.paraview.org/t/error-in-read-hdf5-1-10/979 "2018-12-03T16:31:39Z")

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Hi, I run into the following error when loading hdf5 1.10: HDF5-DIAG: Error detected in HDF5 (1.8.13) thread 0: #000: /Users/kitware/dashboards/buildbot-slave/8275bd07/build/superbuild/hdf5/src/src/H5F.c line 1594 in …

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## [Oculus Rift to visualize PV models](https://discourse.paraview.org/t/oculus-rift-to-visualize-pv-models/981)

<div class="topic-metadata">

**Author:** [@luismestre](https://discourse.paraview.org/u/luismestre)\
**Replies:** 9\
**Last updated:** [December 1, 2018, 7:58pm UTC](https://discourse.paraview.org/t/oculus-rift-to-visualize-pv-models/981 "2018-12-01T19:58:02Z")

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Hi I’m using Oculus Rift to visualize PV models. I’m able to send the model to openVR but I was expecting a more smooth manipulation of the model when using the controllers. I can only manipulate the models pressing th…

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