# Development

**URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=37

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

**Page:** 38

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## [Help creating a custom PythonView](https://discourse.paraview.org/t/help-creating-a-custom-pythonview/602)

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**Author:** [@arnaumiro](https://discourse.paraview.org/u/arnaumiro)\
**Replies:** 1\
**Last updated:** [September 28, 2018, 11:31am UTC](https://discourse.paraview.org/t/help-creating-a-custom-pythonview/602 "2018-09-28T11:31:16Z")

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Hello, I want to create a duplicate of the PythonView for my application so that I can modify the properties of the script via the XML and the default\_values for the script property. I have followed the thread https:/…

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## [Cleaning up Python docs](https://discourse.paraview.org/t/cleaning-up-python-docs/639)

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**Author:** [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)\
**Replies:** 8\
**Last updated:** [September 27, 2018, 1:34pm UTC](https://discourse.paraview.org/t/cleaning-up-python-docs/639 "2018-09-27T13:34:26Z")

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I am looking into cleaning up various docs and documentation generation process. One of the things that’s quite unwieldy with our Python documentation generation stage is the fact that we generate documentation for all p…

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## [Solved once - back again: The vicious "unable to find api-ms-win..." error message](https://discourse.paraview.org/t/solved-once-back-again-the-vicious-unable-to-find-api-ms-win-error-message/636)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 5\
**Last updated:** [September 26, 2018, 3:10pm UTC](https://discourse.paraview.org/t/solved-once-back-again-the-vicious-unable-to-find-api-ms-win-error-message/636 "2018-09-26T15:10:56Z")

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It’s again about the vicious failure of installation package creation after paraview (custom application) superbuild: RuntimeError: Unable to find the api-ms-win-crt-runtime-l1-1-0.dll library from \[…\] Thanks to some p…

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## [Superbuild Python version riddles](https://discourse.paraview.org/t/superbuild-python-version-riddles/619)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 3\
**Last updated:** [September 26, 2018, 2:33pm UTC](https://discourse.paraview.org/t/superbuild-python-version-riddles/619 "2018-09-26T14:33:17Z")

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Again talking about the superbuild I am working with, now still with MSVC2013, PV 5.5.0 and adapted Qt5.9.1, and working with Python 2.7. The superbuild goes through, but during the packaging I am getting the following …

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## ["Official" Windows toolset - just to make sure](https://discourse.paraview.org/t/official-windows-toolset-just-to-make-sure/618)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 2\
**Last updated:** [September 23, 2018, 12:21pm UTC](https://discourse.paraview.org/t/official-windows-toolset-just-to-make-sure/618 "2018-09-23T12:21:28Z")

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In the current git repository, with latest “stable” PV version 5.5.2, I see that the following versions are recommended for Windows: MSVC 2015 (meaning: toolset 140) Qt whatever is supported with MSVC 2015 I am workin…

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## [Linker \_\_declspec problem \[solved\]](https://discourse.paraview.org/t/linker-declspec-problem-solved/584)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 5\
**Last updated:** [September 17, 2018, 7:27am UTC](https://discourse.paraview.org/t/linker-declspec-problem-solved/584 "2018-09-17T07:27:43Z")

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Hello, Working on a PV derived custom application I am writing some “editor” module (in the form of a non-modal dialog) that can be opened through the main application action menus and toolbars. So I also wrote a “…Reac…

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## [multitask OSPRay and EyeDomeLighting using Master build](https://discourse.paraview.org/t/multitask-ospray-and-eyedomelighting-using-master-build/340)

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**Author:** [@ka5855](https://discourse.paraview.org/u/ka5855)\
**Replies:** 4\
**Last updated:** [September 12, 2018, 3:34pm UTC](https://discourse.paraview.org/t/multitask-ospray-and-eyedomelighting-using-master-build/340 "2018-09-12T15:34:08Z")

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On the master build, 5.5.2-626-g13f66fff1 (created using a superbuild-git master and the paraview-git master) both OSPRay and EyeDomeLighting will work properly with a single task. With any more than one task, much of …

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## [ParaView throws bad\_alloc on contour](https://discourse.paraview.org/t/paraview-throws-bad-alloc-on-contour/494)

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**Author:** [@sigvaldm](https://discourse.paraview.org/u/sigvaldm)\
**Replies:** 1\
**Last updated:** [September 11, 2018, 10:14pm UTC](https://discourse.paraview.org/t/paraview-throws-bad-alloc-on-contour/494 "2018-09-11T22:14:03Z")

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Dear community, I have a problem that Paraview 5.5.2 throws bad\_alloc and shuts down whenever I try to do a countour (iso-curves) of a slice of scalar data on a rather small unstructured 3D mesh. The message I get in th…

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## [ParaView installation crashes at 92% due to errors (=Fehler) originating from "class QHeaderView"](https://discourse.paraview.org/t/paraview-installation-crashes-at-92-due-to-errors-fehler-originating-from-class-qheaderview/458)

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**Author:** [@klausb](https://discourse.paraview.org/u/klausb)\
**Replies:** 1\
**Last updated:** [August 21, 2018, 7:11pm UTC](https://discourse.paraview.org/t/paraview-installation-crashes-at-92-due-to-errors-fehler-originating-from-class-qheaderview/458 "2018-08-21T19:11:41Z")

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I tried to install ParaView-5.4.0 using the OpenFoam ThirdParty package of OpenFOAM 6, on Solus Linux. The installed Qt version is 5.11.1-26. I first reported the bug at OpenFOAM, and was asked to report the bug here as …

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## [How to open the .dat file](https://discourse.paraview.org/t/how-to-open-the-dat-file/490)

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**Author:** [@kingpo](https://discourse.paraview.org/u/kingpo)\
**Replies:** 0\
**Last updated:** [August 29, 2018, 1:27am UTC](https://discourse.paraview.org/t/how-to-open-the-dat-file/490 "2018-08-29T01:27:56Z")

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I have a .dat file. How to open it use the paraview. The contents of the document are as follows: VARIABLES = “X”,“Z” ZONE I=47,F=POINT 60.1806 1.0000 66.7734 1.0000 66.9540 1.0833 68.8506 1.0833 69.3924 1.25…

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## [How to add a property to a proxy upon its registration](https://discourse.paraview.org/t/how-to-add-a-property-to-a-proxy-upon-its-registration/432)

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**Author:** [@gregory.zaccaro](https://discourse.paraview.org/u/gregory.zaccaro)\
**Replies:** 1\
**Last updated:** [August 28, 2018, 11:41am UTC](https://discourse.paraview.org/t/how-to-add-a-property-to-a-proxy-upon-its-registration/432 "2018-08-28T11:41:47Z")

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I added to the vtkAlgorithm class an attribute “bool MyAttribute” with its getters and setters. Basically, I need this attribute to be saved in the state files. I could add the property manually to every sources/filters…

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## [Release streamtraces based on openVR remote position](https://discourse.paraview.org/t/release-streamtraces-based-on-openvr-remote-position/449)

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**Author:** [@pcrepier](https://discourse.paraview.org/u/pcrepier)\
**Replies:** 1\
**Last updated:** [August 27, 2018, 3:29pm UTC](https://discourse.paraview.org/t/release-streamtraces-based-on-openvr-remote-position/449 "2018-08-27T15:29:54Z")

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Hi, Together with some colleagues, we have been playing around with the OpenVR plugin, with success so far. We are now wondering about how we could bring up the added value of such post-processing in our workflow. One…

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## [How to debug vtkExodusIIReader for blocks appearing that should be hidden.](https://discourse.paraview.org/t/how-to-debug-vtkexodusiireader-for-blocks-appearing-that-should-be-hidden/339)

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**Author:** [@wascott](https://discourse.paraview.org/u/wascott)\
**Replies:** 1\
**Last updated:** [August 27, 2018, 1:18pm UTC](https://discourse.paraview.org/t/how-to-debug-vtkexodusiireader-for-blocks-appearing-that-should-be-hidden/339 "2018-08-27T13:18:24Z")

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Hi guys, I’m trying to debug a problem on a dataset that I can’t pass out of Sandia. The issue is that with multiple files, when all blocks and sets are turned off, the blocks still appear. Where is the point that the…

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## [what can be customized with XML files](https://discourse.paraview.org/t/what-can-be-customized-with-xml-files/470)

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**Author:** [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)\
**Replies:** 0\
**Last updated:** [August 24, 2018, 1:25pm UTC](https://discourse.paraview.org/t/what-can-be-customized-with-xml-files/470 "2018-08-24T13:25:49Z")

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Hi, I am still lost in the XML/Proxy jungle of PV and I want to know what can be customized in an XML file describing a plugin. For example, If I create a custom view that inherits vtkPVRenderView, in the XML file (unde…

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## [Attribute error: Object has no attribute 'Background'](https://discourse.paraview.org/t/attribute-error-object-has-no-attribute-background/471)

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**Author:** [@kmilo9999](https://discourse.paraview.org/u/kmilo9999)\
**Replies:** 2\
**Last updated:** [August 24, 2018, 2:11pm UTC](https://discourse.paraview.org/t/attribute-error-object-has-no-attribute-background/471 "2018-08-24T14:11:22Z")

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Hi all, So, I’m trying to modify the background of my view. This is part of my python code: from paraview import simple, servermanager .. .. try: view = simple.FindView('RenderView1') simple.Render(view) view.…

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## [is it possible to notify a proxy of a change made in the object manually ?](https://discourse.paraview.org/t/is-it-possible-to-notify-a-proxy-of-a-change-made-in-the-object-manually/466)

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**Author:** [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)\
**Replies:** 3\
**Last updated:** [August 24, 2018, 1:51pm UTC](https://discourse.paraview.org/t/is-it-possible-to-notify-a-proxy-of-a-change-made-in-the-object-manually/466 "2018-08-24T13:51:43Z")

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Hello, I created a custom view where I change the scale of the GridAxes3DActor (vtkPVGridAxes3DActor) and of the actors of the view’s representation when I change the scale of a single representation (so I can compare t…

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## [programmable filter : returning 0/1](https://discourse.paraview.org/t/programmable-filter-returning-0-1/448)

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**Author:** [@michal.wozniak](https://discourse.paraview.org/u/michal.wozniak)\
**Replies:** 1\
**Last updated:** [August 23, 2018, 3:26pm UTC](https://discourse.paraview.org/t/programmable-filter-returning-0-1/448 "2018-08-23T15:26:09Z")

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Hi, https://gitlab.kitware.com/paraview/paraview/issues/17591 Is it still on track for 5.6? To increase performance in our huge pipeline, we are thinking of converting some part of our pipeline into Python programmabl…

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## [ShowComponentLabels XML hint doesn't work for a DoubleVectorProperty](https://discourse.paraview.org/t/showcomponentlabels-xml-hint-doesnt-work-for-a-doublevectorproperty/393)

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**Author:** [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)\
**Replies:** 7\
**Last updated:** [August 23, 2018, 2:00pm UTC](https://discourse.paraview.org/t/showcomponentlabels-xml-hint-doesnt-work-for-a-doublevectorproperty/393 "2018-08-23T14:00:32Z")

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The title says it all. I put a ShowComponentLabels hint inside a DoubleVectorProperty with two ComponentLabel in the XML file describing my filter, but the columns headers are not showing in the property panel.

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## [Ideas to implement a view's zoom on a single axis (dimension) \[Solved\]](https://discourse.paraview.org/t/ideas-to-implement-a-views-zoom-on-a-single-axis-dimension-solved/430)

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**Author:** [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)\
**Replies:** 4\
**Last updated:** [August 23, 2018, 9:21am UTC](https://discourse.paraview.org/t/ideas-to-implement-a-views-zoom-on-a-single-axis-dimension-solved/430 "2018-08-23T09:21:31Z")

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Hello, I want to add a button to the render view (or elsewhere) that will allow me to zoom on a single axis (X or Y dimension). I have a filter that can output a very long vtkImageData (on the Y axis), and I want to zoo…

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## [Enabling Python thread support by default](https://discourse.paraview.org/t/enabling-python-thread-support-by-default/61)

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**Author:** [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)\
**Replies:** 6\
**Last updated:** [August 12, 2018, 6:23pm UTC](https://discourse.paraview.org/t/enabling-python-thread-support-by-default/61 "2018-08-12T18:23:29Z")

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Folks, We have two CMake variables, VTK\_NO\_PYTHON\_THREADS and VTK\_PYTHON\_FULL\_THREADSAFE. These are defaulted so that we don’t use GIL locking in ParaView builds by default. I am wondering if we should indeed enable Py…

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## [Build failure due to a missing dir in StreamLinesRepresentation plugin](https://discourse.paraview.org/t/build-failure-due-to-a-missing-dir-in-streamlinesrepresentation-plugin/409)

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**Author:** [@Haocheng\_Liu](https://discourse.paraview.org/u/Haocheng_Liu)\
**Replies:** 5\
**Last updated:** [August 9, 2018, 8:00pm UTC](https://discourse.paraview.org/t/build-failure-due-to-a-missing-dir-in-streamlinesrepresentation-plugin/409 "2018-08-09T20:00:37Z")

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Hi, I am trying to build paraview master branch on a 2018 MBP. I got a build error as: \[2/24\] Compiling Qt help project StreamLinesRepresentation.qhp FAILED: Plugins/StreamLinesRepresentation/doc/StreamLinesRepresentat…

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## [Setting default properties of filters doesn't work with XML](https://discourse.paraview.org/t/setting-default-properties-of-filters-doesnt-work-with-xml/388)

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**Author:** [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)\
**Replies:** 4\
**Last updated:** [August 6, 2018, 12:29pm UTC](https://discourse.paraview.org/t/setting-default-properties-of-filters-doesnt-work-with-xml/388 "2018-08-06T12:29:20Z")

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Hello, I have noticed that when a filter’s output is vtkMultiBlocDataSet, the chosen representation is “Outline”. In this representation I can’t see the data generated by my filter, so I have to change it manually to “S…

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## [Linux dashboards now crash in pv.ViewSettingsDialog](https://discourse.paraview.org/t/linux-dashboards-now-crash-in-pv-viewsettingsdialog/389)

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**Author:** [@shawn.waldon](https://discourse.paraview.org/u/shawn.waldon)\
**Replies:** 1\
**Last updated:** [August 3, 2018, 5:12pm UTC](https://discourse.paraview.org/t/linux-dashboards-now-crash-in-pv-viewsettingsdialog/389 "2018-08-03T17:12:28Z")

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This is showing up on all GUI dashboards every since the last VTK update (Link to vall output. The stacktrace shows the crash happening in vtkOpenGLTexture::Load. Edit: update after looking through CDash more. nemesis …

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## [Questions about Paraview/Catalyst software architecture](https://discourse.paraview.org/t/questions-about-paraview-catalyst-software-architecture/338)

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**Author:** [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)\
**Replies:** 2\
**Last updated:** [July 19, 2018, 7:30am UTC](https://discourse.paraview.org/t/questions-about-paraview-catalyst-software-architecture/338 "2018-07-19T07:30:27Z")

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Hello, I am writing a custom application based on Paraview, and I really want to understand/I am curious about how some aspects are managed. If you can give me answers/informations about one or many of the questions li…

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## [\[Solved\] Adding metadata to a vtkInformation or a grid object flowing through the pipeline](https://discourse.paraview.org/t/solved-adding-metadata-to-a-vtkinformation-or-a-grid-object-flowing-through-the-pipeline/318)

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**Author:** [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)\
**Replies:** 6\
**Last updated:** [July 18, 2018, 12:47pm UTC](https://discourse.paraview.org/t/solved-adding-metadata-to-a-vtkinformation-or-a-grid-object-flowing-through-the-pipeline/318 "2018-07-18T12:47:40Z")

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Hello, I need to retrieve some metadata (user information e.g. distances in meters) related to a data object (e.g. vtkImageData) in my Paraview’s filters plugins. I noticed that a filter’s output is shallow copied in t…

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## [Custom filter/CPD - Event-Driven](https://discourse.paraview.org/t/custom-filter-cpd-event-driven/295)

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**Author:** [@michal.wozniak](https://discourse.paraview.org/u/michal.wozniak)\
**Replies:** 3\
**Last updated:** [July 18, 2018, 12:28am UTC](https://discourse.paraview.org/t/custom-filter-cpd-event-driven/295 "2018-07-18T00:28:27Z")

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Hi @utkarsh.ayachit, My colleagues and I went to meet you a couple of months ago during Kitware’s training courses. We told you about our problem with our huge state files and how long it was taking during each update. …

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## [SaveAnimation](https://discourse.paraview.org/t/saveanimation/296)

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**Author:** [@jfavre](https://discourse.paraview.org/u/jfavre)\
**Replies:** 1\
**Last updated:** [July 13, 2018, 7:48am UTC](https://discourse.paraview.org/t/saveanimation/296 "2018-07-13T07:48:10Z")

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I have an issue using SaveAnimation if running in batch mode only when using a \*.pvti.series JSON collection of files. if running client-server in interactive mode, no problem, SaveAnimation() will save ALL my timesteps…

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## [Vector Graphics Output issues](https://discourse.paraview.org/t/vector-graphics-output-issues/299)

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**Author:** [@bastian](https://discourse.paraview.org/u/bastian)\
**Replies:** 4\
**Last updated:** [July 11, 2018, 2:52pm UTC](https://discourse.paraview.org/t/vector-graphics-output-issues/299 "2018-07-11T14:52:46Z")

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Hello, I’m encountering issues with the vector graphics output (Export Scene \> svg \> … ) the colorbar displacement appears to be a bug so do the two text layers on top of one another Additional wishes for a more us…

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## [Bug of OpenVR plugin in 5.5.0-5.5.2](https://discourse.paraview.org/t/bug-of-openvr-plugin-in-5-5-0-5-5-2/279)

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**Author:** [@genesoul](https://discourse.paraview.org/u/genesoul)\
**Replies:** 0\
**Last updated:** [July 5, 2018, 1:38am UTC](https://discourse.paraview.org/t/bug-of-openvr-plugin-in-5-5-0-5-5-2/279 "2018-07-05T01:38:08Z")

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when i play the animation of example ( can.ex2). It Can’t render properly with 5.5.\* in VR environment （HTC vive) .it can only render the first frame and last frame in 5.5.0-5.5.2. it works well in paraview 5.4.1( Par…

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## [General design questions for plugins programming](https://discourse.paraview.org/t/general-design-questions-for-plugins-programming/261)

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**Author:** [@raffienficiaud](https://discourse.paraview.org/u/raffienficiaud)\
**Replies:** 5\
**Last updated:** [July 3, 2018, 12:19pm UTC](https://discourse.paraview.org/t/general-design-questions-for-plugins-programming/261 "2018-07-03T12:19:26Z")

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Dear forum, My name is Raffi Enficiaud, and I am developing a plugin in Paraview for brain data visualization. I am relatively new to Paraview/VTK and plugin developments, so please accept my apologies if my questions s…

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