# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=196

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**Page:** 197

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## [Sum up scalar along the path of a StreamTracer](https://discourse.paraview.org/t/sum-up-scalar-along-the-path-of-a-streamtracer/3143)

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**Author:** [@fantasio](https://discourse.paraview.org/u/fantasio)\
**Replies:** 1\
**Last updated:** [December 9, 2019, 10:25am UTC](https://discourse.paraview.org/t/sum-up-scalar-along-the-path-of-a-streamtracer/3143 "2019-12-09T10:25:34Z")

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Hi, i want to use the StreamTracer and sum up the values of a point value along its streamlines. So along of one streamline, the longer the path becomes, the sum increases. Next is i want to visualize the new calculated…

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## [Force offscreen rendering from direct python script](https://discourse.paraview.org/t/force-offscreen-rendering-from-direct-python-script/3144)

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**Author:** [@gilcu2](https://discourse.paraview.org/u/gilcu2)\
**Replies:** 1\
**Last updated:** [December 9, 2019, 10:22am UTC](https://discourse.paraview.org/t/force-offscreen-rendering-from-direct-python-script/3144 "2019-12-09T10:22:16Z")

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How can I force offscreen rendering running from python (not from pvpython)

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## [Show obj with mtl](https://discourse.paraview.org/t/show-obj-with-mtl/2932)

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**Author:** [@gilcu2](https://discourse.paraview.org/u/gilcu2)\
**Replies:** 11\
**Last updated:** [December 9, 2019, 10:07am UTC](https://discourse.paraview.org/t/show-obj-with-mtl/2932 "2019-12-09T10:07:50Z")

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Hi, there is a direct way to show obj files file using the information in the associated mtl files. I have read about transforming the data to vtks and save in state files but is a problematic to process large files in p…

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## [ospray backend with mpi offload](https://discourse.paraview.org/t/ospray-backend-with-mpi-offload/3042)

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**Author:** [@gilcu2](https://discourse.paraview.org/u/gilcu2)\
**Replies:** 12\
**Last updated:** [December 6, 2019, 11:28pm UTC](https://discourse.paraview.org/t/ospray-backend-with-mpi-offload/3042 "2019-12-06T23:28:33Z")

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Hello, how to launch pvbatch using the ospray backend in parallel with mpi? I am trying something like this: mpirun -ppn 1 -host localhost VTKOSPRAY\_ARGS="--osp:mpi" \\ ./pvbatch script.py : -host n1, n2 ./osp…

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## [ParaView w/ Python 3 on Mac - when?](https://discourse.paraview.org/t/paraview-w-python-3-on-mac-when/3083)

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**Author:** [@banesullivan](https://discourse.paraview.org/u/banesullivan)\
**Replies:** 9\
**Last updated:** [December 6, 2019, 3:39pm UTC](https://discourse.paraview.org/t/paraview-w-python-3-on-mac-when/3083 "2019-12-06T15:39:53Z")

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It looks like the public builds of ParaView 5.7 are shipping with Python 3.7 for Windows and Linux :fireworks: :tada: :rocket: but not Mac yet… is there an expected timeline for this? https://www.paraview.org/download/

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## [Animation Memory](https://discourse.paraview.org/t/animation-memory/3126)

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**Author:** [@gilcu2](https://discourse.paraview.org/u/gilcu2)\
**Replies:** 1\
**Last updated:** [December 6, 2019, 2:48pm UTC](https://discourse.paraview.org/t/animation-memory/3126 "2019-12-06T14:48:22Z")

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Doing an animation in python memory use increase at every step. Is there any way to avoid this or an explanation of why this happens. 1 year ago someone asked something similar https://discourse.paraview.org/t/paraview-…

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## [Missing vectors (do not appear) in paraview view](https://discourse.paraview.org/t/missing-vectors-do-not-appear-in-paraview-view/3101)

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**Author:** [@nayla\_salvador](https://discourse.paraview.org/u/nayla_salvador)\
**Replies:** 9\
**Last updated:** [December 6, 2019, 12:16pm UTC](https://discourse.paraview.org/t/missing-vectors-do-not-appear-in-paraview-view/3101 "2019-12-06T12:16:20Z")

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605/5000 Hello everyone, I am having difficulty understanding paraview. I have a structured mesh which has a velocity field of a reservoir. In the central region of the reservoir, we have about 30 cells in the Y direc…

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## [Visualizing sets of boundary mesh points as lines](https://discourse.paraview.org/t/visualizing-sets-of-boundary-mesh-points-as-lines/3120)

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**Author:** [@parajan](https://discourse.paraview.org/u/parajan)\
**Replies:** 3\
**Last updated:** [December 6, 2019, 4:34am UTC](https://discourse.paraview.org/t/visualizing-sets-of-boundary-mesh-points-as-lines/3120 "2019-12-06T04:34:03Z")

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I have a csv file with 3 columns. The first and second columns are x,y coordinates of mesh boundary points. The third column is an integer that tells which boundary the point is a part of. Here is an example file: bound…

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## [Read Int16 from binary file in XDMF](https://discourse.paraview.org/t/read-int16-from-binary-file-in-xdmf/3122)

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**Author:** [@reox](https://discourse.paraview.org/u/reox)\
**Replies:** 1\
**Last updated:** [December 5, 2019, 11:59am UTC](https://discourse.paraview.org/t/read-int16-from-binary-file-in-xdmf/3122 "2019-12-05T11:59:38Z")

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I would like to load a binary file containing Int16 numbers using XDMF. The DataItem tag seems to support a Precision attribute, which I assume is the number of bits? But, if I define a DataItem like this: \<DataItem Di…

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## [Catalyst script generator issues in 5.6.0-r2](https://discourse.paraview.org/t/catalyst-script-generator-issues-in-5-6-0-r2/769)

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**Author:** [@paraview](https://discourse.paraview.org/u/paraview)\
**Replies:** 9\
**Last updated:** [December 4, 2019, 3:15pm UTC](https://discourse.paraview.org/t/catalyst-script-generator-issues-in-5-6-0-r2/769 "2019-12-04T15:15:44Z")

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Hi, I’m having some troubles with the script generators in 5.6.0 rc2. When I have an annotate time source in the scene the script dies when running in situ. Removing the annotate time source from the scene solves the pr…

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## [Flow rate over time](https://discourse.paraview.org/t/flow-rate-over-time/3115)

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**Author:** [@vishruthdilip](https://discourse.paraview.org/u/vishruthdilip)\
**Replies:** 7\
**Last updated:** [December 4, 2019, 10:25am UTC](https://discourse.paraview.org/t/flow-rate-over-time/3115 "2019-12-04T10:25:06Z")

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Hello, I use the MESHFREE solver. I wanted to know if there was a way to plot volume flow rate or mass flow rate across a surface over time. I am relatively new to Paraview. Any help would be appreciated.

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## [Transient Simulation- Files in Tecplot Format](https://discourse.paraview.org/t/transient-simulation-files-in-tecplot-format/3107)

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**Author:** [@tskiado](https://discourse.paraview.org/u/tskiado)\
**Replies:** 5\
**Last updated:** [December 4, 2019, 10:15am UTC](https://discourse.paraview.org/t/transient-simulation-files-in-tecplot-format/3107 "2019-12-04T10:15:11Z")

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Hi, I have a set of files in tecplot format. Each file corresponds to a different timestep and time value. How can I assign a time value to each file? Thanks

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## [Paraview Ospray different results with materials](https://discourse.paraview.org/t/paraview-ospray-different-results-with-materials/3116)

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**Author:** [@gilcu2](https://discourse.paraview.org/u/gilcu2)\
**Replies:** 1\
**Last updated:** [December 4, 2019, 9:51am UTC](https://discourse.paraview.org/t/paraview-ospray-different-results-with-materials/3116 "2019-12-04T09:51:46Z")

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I have an obj/mtl files that want to render in pv using the right material but the final image colours look so different. In Ospray “ospExampleViewer vase.obj” In Paraview followed https://public.kitware.com/pipermail…

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## [mpi paraview running error](https://discourse.paraview.org/t/mpi-paraview-running-error/3113)

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**Author:** [@lyz](https://discourse.paraview.org/u/lyz)\
**Replies:** 1\
**Last updated:** [December 4, 2019, 9:26am UTC](https://discourse.paraview.org/t/mpi-paraview-running-error/3113 "2019-12-04T09:26:20Z")

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I build paraview5.7 with ms-mpi 10.1.2 and VRPN for immersive paraview. When I run paraview, I get some errors: (smpd -d is running before) (in master node) mpiexec -hosts 3 renderleft rendermiddle renderright .\\pvse…

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## [Spack related paraview issues](https://discourse.paraview.org/t/spack-related-paraview-issues/3112)

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**Author:** [@EthanStam](https://discourse.paraview.org/u/EthanStam)\
**Replies:** 2\
**Last updated:** [December 4, 2019, 2:41am UTC](https://discourse.paraview.org/t/spack-related-paraview-issues/3112 "2019-12-04T02:41:47Z")

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Where is the best place to create issues regarding paraview and spack? In the paraview gitlab? In the spack github? Thanks, Ethan

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## [How to plot a density from a .mrc file?](https://discourse.paraview.org/t/how-to-plot-a-density-from-a-mrc-file/3086)

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**Author:** [@szsdk](https://discourse.paraview.org/u/szsdk)\
**Replies:** 3\
**Last updated:** [December 3, 2019, 3:02pm UTC](https://discourse.paraview.org/t/how-to-plot-a-density-from-a-mrc-file/3086 "2019-12-03T15:02:40Z")

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I want to plot a 3d array stored in a mrc file. But after open it, nothing is plotted. I also tried to add contour to it, but still failed. I think this function should be pretty basic. I must miss some critical steps. t…

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## [Remove attribute](https://discourse.paraview.org/t/remove-attribute/3108)

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**Author:** [@gilcu2](https://discourse.paraview.org/u/gilcu2)\
**Replies:** 1\
**Last updated:** [December 3, 2019, 3:00pm UTC](https://discourse.paraview.org/t/remove-attribute/3108 "2019-12-03T15:00:15Z")

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Hi, I want to remove attributes (columns in the spreadsheet view) associated with point data or cells data before saving. Is this possible? For example, I found that Calculator filter adds attributes, how remove? Thank…

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## [Title on top of figure](https://discourse.paraview.org/t/title-on-top-of-figure/3105)

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**Author:** [@marios\_geo](https://discourse.paraview.org/u/marios_geo)\
**Replies:** 9\
**Last updated:** [December 3, 2019, 2:53pm UTC](https://discourse.paraview.org/t/title-on-top-of-figure/3105 "2019-12-03T14:53:52Z")

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Hi, I have about 50 different vtk files, that each represent boreholes in space. Can I add an individual title, on top of each vtk (probably that scales with x-axis label etc), so I can see what is what? Best

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## [number of cell](https://discourse.paraview.org/t/number-of-cell/3097)

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**Author:** [@Vaya\_Putra](https://discourse.paraview.org/u/Vaya_Putra)\
**Replies:** 4\
**Last updated:** [December 2, 2019, 3:38pm UTC](https://discourse.paraview.org/t/number-of-cell/3097 "2019-12-02T15:38:21Z")

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coba.vtu (152.2 KB) hi i have grid 25x25, i am confused since i visualize in paraview the number of cell not in order, its like random. is that a problem from my VTU file ? thank you

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## [pvserver rendering on "Quadro P4000"](https://discourse.paraview.org/t/pvserver-rendering-on-quadro-p4000/3099)

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**Author:** [@hungryfish](https://discourse.paraview.org/u/hungryfish)\
**Replies:** 5\
**Last updated:** [December 2, 2019, 2:40pm UTC](https://discourse.paraview.org/t/pvserver-rendering-on-quadro-p4000/3099 "2019-12-02T14:40:16Z")

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Thanks again to Mathieu! running client/server in parallel works mpirun -np 4 --mca btl\_openib\_allow\_ib 1 bin/pvserver -display localhost:0 but remote rendering of pvserver still disabled (Display not accessible on…

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## [file parallelism with obj/stl](https://discourse.paraview.org/t/file-parallelism-with-obj-stl/3075)

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**Author:** [@gilcu2](https://discourse.paraview.org/u/gilcu2)\
**Replies:** 5\
**Last updated:** [December 2, 2019, 11:54am UTC](https://discourse.paraview.org/t/file-parallelism-with-obj-stl/3075 "2019-12-02T11:54:37Z")

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I have a python script that read obj/mtl files and shows the right material. it uses the obj\_mtl\_importer.py shared here. When I run it under mpi/pvbatch doesn’t escalate. I think because of the way to applying the mate…

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## [display MHD image as cell not points](https://discourse.paraview.org/t/display-mhd-image-as-cell-not-points/3065)

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**Author:** [@reox](https://discourse.paraview.org/u/reox)\
**Replies:** 8\
**Last updated:** [December 2, 2019, 11:45am UTC](https://discourse.paraview.org/t/display-mhd-image-as-cell-not-points/3065 "2019-12-02T11:45:20Z")

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I think this might be a very simple question, but I already asked a few colleagues and also searched in the documentation but maybe I’m using the wrong terms… So please bare with me :slightly\_smiling\_face: I have some M…

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## [Parallel aware file format](https://discourse.paraview.org/t/parallel-aware-file-format/3093)

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**Author:** [@gilcu2](https://discourse.paraview.org/u/gilcu2)\
**Replies:** 1\
**Last updated:** [December 2, 2019, 9:41am UTC](https://discourse.paraview.org/t/parallel-aware-file-format/3093 "2019-12-02T09:41:45Z")

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Hello, I have several vtp files and I want to process it in parallel. I have read that I can create a pvtp parallel file that point to the serial vtp and then a parallel server distribute between the process. Is there …

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## [MPI version](https://discourse.paraview.org/t/mpi-version/3088)

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**Author:** [@lyz](https://discourse.paraview.org/u/lyz)\
**Replies:** 1\
**Last updated:** [December 2, 2019, 8:58am UTC](https://discourse.paraview.org/t/mpi-version/3088 "2019-12-02T08:58:28Z")

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Which MPI version should I use when I build ParaView 5.7.0 (vs2015, qt5.12, windows-x64)

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## [Origin](https://discourse.paraview.org/t/origin/3090)

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**Author:** [@DominionSoftware](https://discourse.paraview.org/u/DominionSoftware)\
**Replies:** 1\
**Last updated:** [December 2, 2019, 8:53am UTC](https://discourse.paraview.org/t/origin/3090 "2019-12-02T08:53:17Z")

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Is it possible to change a whole scene origin?

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## [ParaView Support Files Format](https://discourse.paraview.org/t/paraview-support-files-format/1060)

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**Author:** [@haiboli](https://discourse.paraview.org/u/haiboli)\
**Replies:** 7\
**Last updated:** [December 2, 2019, 8:46am UTC](https://discourse.paraview.org/t/paraview-support-files-format/1060 "2019-12-02T08:46:12Z")

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Hello everyone! ParaView is a powerful soft, it’s very great ! I found it support nastran files format. When I want to open op2 files why it can’t work? Could some one tell me why? Thank you very much!

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## [paraView build from source (v5.6.0) - makefile missed](https://discourse.paraview.org/t/paraview-build-from-source-v5-6-0-makefile-missed/3080)

<div class="topic-metadata">

**Author:** [@hungryfish](https://discourse.paraview.org/u/hungryfish)\
**Replies:** 4\
**Last updated:** [November 29, 2019, 4:01pm UTC](https://discourse.paraview.org/t/paraview-build-from-source-v5-6-0-makefile-missed/3080 "2019-11-29T16:01:16Z")

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Can’t find a ‘Makefile’ after configuring successfully using ccmake in build directory (make: \*\*\* No targets specified and no makefile found. Stop.) SLES12SP3, cmake 3.12.0 …, CMakeCache.txt exists Should I use ‘Ninj…

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## [I am new to ParaView and I would like to know how can I use my own data for simulation.](https://discourse.paraview.org/t/i-am-new-to-paraview-and-i-would-like-to-know-how-can-i-use-my-own-data-for-simulation/3062)

<div class="topic-metadata">

**Author:** [@SandyChak](https://discourse.paraview.org/u/SandyChak)\
**Replies:** 2\
**Last updated:** [November 29, 2019, 3:02pm UTC](https://discourse.paraview.org/t/i-am-new-to-paraview-and-i-would-like-to-know-how-can-i-use-my-own-data-for-simulation/3062 "2019-11-29T15:02:29Z")

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I am new to ParaView and I would to know how to add my own data to create a model.

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## [Xdmf3 reader - FiniteElementFunction](https://discourse.paraview.org/t/xdmf3-reader-finiteelementfunction/3079)

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**Author:** [@xgarnaud](https://discourse.paraview.org/u/xgarnaud)\
**Replies:** 0\
**Last updated:** [November 29, 2019, 2:37pm UTC](https://discourse.paraview.org/t/xdmf3-reader-finiteelementfunction/3079 "2019-11-29T14:37:58Z")

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Dear all, I’d like to use the Xdmf3 reader with attributes defined at the nodes, the cells and with FiniteElementFunction (Raviart Thomas)test.xdmf (2.6 KB) . It seems there is a bug in this case. Each one independentl…

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## [How to speed up the selection of arrays for reading?](https://discourse.paraview.org/t/how-to-speed-up-the-selection-of-arrays-for-reading/3074)

<div class="topic-metadata">

**Author:** [@e-kolosov](https://discourse.paraview.org/u/e-kolosov)\
**Replies:** 3\
**Last updated:** [November 29, 2019, 12:04pm UTC](https://discourse.paraview.org/t/how-to-speed-up-the-selection-of-arrays-for-reading/3074 "2019-11-29T12:04:07Z")

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Hello. In the reader, I use vtkDataArraySelection and the following xml description: arrays\_selection.xml (943 Bytes) vtkDataArraySelection contains 10k array names and I want to mark 1k of them for reading. This actio…

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