# Development

**URL:** https://discourse.slicer.org/c/dev/5.md?no_subcategories=false&page=108

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

**Page:** 109

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## [Tests failing on Slicer factory that do not fail locally](https://discourse.slicer.org/t/tests-failing-on-slicer-factory-that-do-not-fail-locally/7109)

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**Author:** [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Replies:** 7\
**Last updated:** [June 11, 2019, 6:48pm UTC](https://discourse.slicer.org/t/tests-failing-on-slicer-factory-that-do-not-fail-locally/7109 "2019-06-11T18:48:46Z")

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I noticed a while ago that about a dozen tests keep failing on the Slicer dashboard both for Windows and Mac. I ran the tests that I think I’d be responsible for fixing (py\_SubjectHierarchyGenericSelfTest, qSlicerModelsM…

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## [Schedule for Slicer 4.10.2 patch release](https://discourse.slicer.org/t/schedule-for-slicer-4-10-2-patch-release/6783)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 4\
**Last updated:** [May 23, 2019, 2:49pm UTC](https://discourse.slicer.org/t/schedule-for-slicer-4-10-2-patch-release/6783 "2019-05-23T14:49:28Z")

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Hi all! We will be initiating the Slicer 4.10.2 patch release this week. Among other things, this will fix the landmark registration bug in the previous Markups design. The roadmap for this release is here. Commits c…

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## [Python non ascii char](https://discourse.slicer.org/t/python-non-ascii-char/7070)

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**Author:** [@Mr.wyr](https://discourse.slicer.org/u/Mr.wyr)\
**Replies:** 3\
**Last updated:** [June 8, 2019, 9:56pm UTC](https://discourse.slicer.org/t/python-non-ascii-char/7070 "2019-06-08T21:56:13Z")

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how can i use chinese in python character, i add #coding:utf-8 in top, but it’s not work

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## [python3 with slicer 4.10.x?](https://discourse.slicer.org/t/python3-with-slicer-4-10-x/7084)

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**Author:** [@cheese1](https://discourse.slicer.org/u/cheese1)\
**Replies:** 1\
**Last updated:** [June 8, 2019, 7:44pm UTC](https://discourse.slicer.org/t/python3-with-slicer-4-10-x/7084 "2019-06-08T19:44:24Z")

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i try to package slicer for fedora and have a problem with python. fedora is switching to python3 and already removed a lot of python2 packages. are there any plans for supporting python3 with 4.10.x (the stable branch…

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## [How to integrate external libraries such as CGAL with slicer 3D?](https://discourse.slicer.org/t/how-to-integrate-external-libraries-such-as-cgal-with-slicer-3d/6843)

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**Author:** [@Baseer\_Piracha](https://discourse.slicer.org/u/Baseer_Piracha)\
**Replies:** 4\
**Last updated:** [June 8, 2019, 4:12pm UTC](https://discourse.slicer.org/t/how-to-integrate-external-libraries-such-as-cgal-with-slicer-3d/6843 "2019-06-08T16:12:53Z")

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How to integrate external libraries such as CGAL with slicer 3D?

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## [Popup table selection change](https://discourse.slicer.org/t/popup-table-selection-change/7051)

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**Author:** [@holmesrb](https://discourse.slicer.org/u/holmesrb)\
**Replies:** 2\
**Last updated:** [June 8, 2019, 3:09pm UTC](https://discourse.slicer.org/t/popup-table-selection-change/7051 "2019-06-08T15:09:10Z")

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I am developing an extension to display the results of some neuro image processing which involves reading a CSV file into a table. I need the table to be a popup and the following code snippet from the slicer website doe…

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## [Extension download statistics](https://discourse.slicer.org/t/extension-download-statistics/1250)

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**Author:** [@gcsharp](https://discourse.slicer.org/u/gcsharp)\
**Replies:** 3\
**Last updated:** [June 7, 2019, 6:11pm UTC](https://discourse.slicer.org/t/extension-download-statistics/1250 "2019-06-07T18:11:33Z")

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Hi, is it possible to get download statistics for an extension?

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## [3d rendering of homogenous volume](https://discourse.slicer.org/t/3d-rendering-of-homogenous-volume/6992)

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**Author:** [@asch](https://discourse.slicer.org/u/asch)\
**Replies:** 3\
**Last updated:** [June 4, 2019, 5:25pm UTC](https://discourse.slicer.org/t/3d-rendering-of-homogenous-volume/6992 "2019-06-04T17:25:11Z")

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Hi, I’m trying to render a uniform scalar volume in 3D using python scripting. I managed to load the volume and visualize it in the slice viewer, but in the 3D view the volume is completely transparent. The volume is f…

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## [ITK5 released, are we ready to start using it?](https://discourse.slicer.org/t/itk5-released-are-we-ready-to-start-using-it/6985)

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**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\
**Replies:** 2\
**Last updated:** [May 31, 2019, 8:34pm UTC](https://discourse.slicer.org/t/itk5-released-are-we-ready-to-start-using-it/6985 "2019-05-31T20:34:47Z")

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Now that ITK5 is officially out, are there any roadblocks to updating slicer? (and congrats to the ITK team! :trumpet: )

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## [Export description from 3d data](https://discourse.slicer.org/t/export-description-from-3d-data/6981)

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**Author:** [@safa](https://discourse.slicer.org/u/safa)\
**Replies:** 5\
**Last updated:** [May 31, 2019, 1:17pm UTC](https://discourse.slicer.org/t/export-description-from-3d-data/6981 "2019-05-31T13:17:50Z")

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how can I export a description of 3D data (information about this data) in a txt file or binary file ,…?

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## [How to preserve the direction cosine matrix](https://discourse.slicer.org/t/how-to-preserve-the-direction-cosine-matrix/6968)

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**Author:** [@wpgao](https://discourse.slicer.org/u/wpgao)\
**Replies:** 2\
**Last updated:** [May 31, 2019, 2:07am UTC](https://discourse.slicer.org/t/how-to-preserve-the-direction-cosine-matrix/6968 "2019-05-31T02:07:50Z")

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Hi Guys, Recently, I had write a batch to resample a series of MR volumes. However, there is one problem that the direction cosine matrix of the output volume is not the same as that of the input volume. Thanks！ reade…

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## [Multithreading in extension](https://discourse.slicer.org/t/multithreading-in-extension/6941)

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**Author:** [@n2018](https://discourse.slicer.org/u/n2018)\
**Replies:** 8\
**Last updated:** [May 30, 2019, 7:43pm UTC](https://discourse.slicer.org/t/multithreading-in-extension/6941 "2019-05-30T19:43:41Z")

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Hello! I am trying to implement multithreading in my own extension to 3DSlicer, here is the approximate scheme: from Logic.run() ThreadA is started from ThreadA.run ThreadB is started in ThreadB.run there is infinite …

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## [Should we do something about EM segmenter?](https://discourse.slicer.org/t/should-we-do-something-about-em-segmenter/4382)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 4\
**Last updated:** [May 30, 2019, 12:46pm UTC](https://discourse.slicer.org/t/should-we-do-something-about-em-segmenter/4382 "2019-05-30T12:46:57Z")

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## [Can I read and modify a transform matrix with python](https://discourse.slicer.org/t/can-i-read-and-modify-a-transform-matrix-with-python/6964)

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**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 1\
**Last updated:** [May 30, 2019, 3:45am UTC](https://discourse.slicer.org/t/can-i-read-and-modify-a-transform-matrix-with-python/6964 "2019-05-30T03:45:05Z")

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can I read and modify a transform matrix with python directly(not the GUI of transform) in slicer. for example: Read display (transformMatrix) I will get a 4\*4matrix: \[ \[ 1 0 0 52.64097\] \[ 0 1 0 -46.12696\] \[ …

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## [Build error linux related to introduction of Slicer\_BUILD\_WEBENGINE\_SUPPORT option](https://discourse.slicer.org/t/build-error-linux-related-to-introduction-of-slicer-build-webengine-support-option/6738)

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**Author:** [@gcsharp](https://discourse.slicer.org/u/gcsharp)\
**Replies:** 9\
**Last updated:** [May 28, 2019, 5:25pm UTC](https://discourse.slicer.org/t/build-error-linux-related-to-introduction-of-slicer-build-webengine-support-option/6738 "2019-05-28T17:25:10Z")

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Build failure in clean build directory. CMakeFiles/qMRMLWidgets.dir/qMRMLLayoutManager.cxx.o: In function \`qMRMLLayoutChartViewFactory::qMRMLLayoutChartViewFactory(QObject\*)': qMRMLLayoutManager.cxx:(.text+0x7b0): undef…

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## [I can't save data as niftii file](https://discourse.slicer.org/t/i-cant-save-data-as-niftii-file/6927)

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**Author:** [@safa](https://discourse.slicer.org/u/safa)\
**Replies:** 2\
**Last updated:** [May 25, 2019, 2:23pm UTC](https://discourse.slicer.org/t/i-cant-save-data-as-niftii-file/6927 "2019-05-25T14:23:05Z")

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why i can’t save data as .nii file? i have only (.mrmrl) (.mrb) (.\*) options to choose

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## [How can I switch the python version from 3.6.7 to 2.7.13?](https://discourse.slicer.org/t/how-can-i-switch-the-python-version-from-3-6-7-to-2-7-13/6925)

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**Author:** [@JaceYang](https://discourse.slicer.org/u/JaceYang)\
**Replies:** 1\
**Last updated:** [May 25, 2019, 12:04pm UTC](https://discourse.slicer.org/t/how-can-i-switch-the-python-version-from-3-6-7-to-2-7-13/6925 "2019-05-25T12:04:13Z")

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For some purposes,I need the python 2.7.13 in Slicer to make some old code work. Is there anyone have done this thing before? Any help is appreciate.

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## [MatlabBridge generated module without data volume format conversion](https://discourse.slicer.org/t/matlabbridge-generated-module-without-data-volume-format-conversion/6865)

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**Author:** [@wpgao](https://discourse.slicer.org/u/wpgao)\
**Replies:** 2\
**Last updated:** [May 22, 2019, 9:31am UTC](https://discourse.slicer.org/t/matlabbridge-generated-module-without-data-volume-format-conversion/6865 "2019-05-22T09:31:06Z")

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Hi Guys, We used matlabbridge to develop our own module. The method we have developed using matlab and only support .nii file. However, with the module generated by matlabbridge according to the tutorial, it seems that …

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## [Reminder: No nightly builds tonight](https://discourse.slicer.org/t/reminder-no-nightly-builds-tonight/6824)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [May 16, 2019, 6:41pm UTC](https://discourse.slicer.org/t/reminder-no-nightly-builds-tonight/6824 "2019-05-16T18:41:12Z")

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We are generating the release packages for 4.10.2. Nightly builds will resume tomorrow night.

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## [Slicer fails to start after adding a scripted module](https://discourse.slicer.org/t/slicer-fails-to-start-after-adding-a-scripted-module/6807)

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**Author:** [@batuhan\_edguer](https://discourse.slicer.org/u/batuhan_edguer)\
**Replies:** 2\
**Last updated:** [May 15, 2019, 8:08pm UTC](https://discourse.slicer.org/t/slicer-fails-to-start-after-adding-a-scripted-module/6807 "2019-05-15T20:08:24Z")

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Hello I’m getting this error, tried to reinstall but it did not… Traceback (most recent call last): File “D:\\Program Files\\Slicer 4.10.1\\bin\\Python\\slicer\\ScriptedLoadableModule.py”, line 202, in onReloadAndTest self.…

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## [Can I perform the inverse operation of the 6 dof robot arm in the slicer?](https://discourse.slicer.org/t/can-i-perform-the-inverse-operation-of-the-6-dof-robot-arm-in-the-slicer/6769)

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**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 2\
**Last updated:** [May 13, 2019, 12:31pm UTC](https://discourse.slicer.org/t/can-i-perform-the-inverse-operation-of-the-6-dof-robot-arm-in-the-slicer/6769 "2019-05-13T12:31:34Z")

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Can I perform the inverse operation of the 6 dof robot arm in the slicer?

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## [Streamlining maintenance of download.slicer.org](https://discourse.slicer.org/t/streamlining-maintenance-of-download-slicer-org/6755)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 0\
**Last updated:** [March 21, 2019, 4:15pm UTC](https://discourse.slicer.org/t/streamlining-maintenance-of-download-slicer-org/6755 "2019-03-21T16:15:40Z")

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Makes sense. Now would be a good time to work with @mhalle and @freephile so that: GitHub - mhalle/slicer4-download\_deprecated is either transferred to the Slicer organization (and renamed to https://github.com/Slicer…

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## [Create segmentation from simpleItk Image](https://discourse.slicer.org/t/create-segmentation-from-simpleitk-image/6723)

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**Author:** [@n2018](https://discourse.slicer.org/u/n2018)\
**Replies:** 1\
**Last updated:** [May 7, 2019, 10:41pm UTC](https://discourse.slicer.org/t/create-segmentation-from-simpleitk-image/6723 "2019-05-07T22:41:02Z")

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Hello! Could you please help me, is there a way to create a new segmentation and add asegment into it from simpleItk Image object (I mean the way through the python code)

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## [DICOM multiframe support](https://discourse.slicer.org/t/dicom-multiframe-support/4806)

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**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\
**Replies:** 23\
**Last updated:** [January 3, 2019, 11:09pm UTC](https://discourse.slicer.org/t/dicom-multiframe-support/4806 "2019-01-03T23:09:08Z")

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This thread contains a link to a dicom multiframe object David Clunie created. @fedorov reports that it doesn’t load correctly in Slicer. https://groups.google.com/forum/?utm\_medium=email&utm\_source=footer#!msg/dicom4q…

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## [Converters -\> Create a DICOM Series](https://discourse.slicer.org/t/converters-create-a-dicom-series/6708)

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**Author:** [@gcsharp](https://discourse.slicer.org/u/gcsharp)\
**Replies:** 1\
**Last updated:** [May 6, 2019, 8:02pm UTC](https://discourse.slicer.org/t/converters-create-a-dicom-series/6708 "2019-05-06T20:02:45Z")

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Is “Converters” -\> “Create a DICOM Series” supported? Is there any difference between using that feature compared with “Data” -\> “Export to DICOM”? Do we want/need both methods?

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## [I cannot find some config file while running SlicerVirtualReality tests](https://discourse.slicer.org/t/i-cannot-find-some-config-file-while-running-slicervirtualreality-tests/6615)

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**Author:** [@JaceYang](https://discourse.slicer.org/u/JaceYang)\
**Replies:** 13\
**Last updated:** [May 6, 2019, 7:06am UTC](https://discourse.slicer.org/t/i-cannot-find-some-config-file-while-running-slicervirtualreality-tests/6615 "2019-05-06T07:06:17Z")

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I want to run qSlicerVirtualRealityModuleCxxTests but it says I already build Slicer and SlicerVirtualReality successfully. I cannot find qSlicerVirtualRealityModuleGenericCxxTestsLauncherSettings.ini in the SlicerV…

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## [Update: Slicer 4.10 release will be initiated tomorrow morning](https://discourse.slicer.org/t/update-slicer-4-10-release-will-be-initiated-tomorrow-morning/4422)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 25\
**Last updated:** [January 10, 2019, 4:59pm UTC](https://discourse.slicer.org/t/update-slicer-4-10-release-will-be-initiated-tomorrow-morning/4422 "2019-01-10T16:59:03Z")

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Tonight we will let the regular nightly build take place, then after we confirm the build complete on all platforms with all tests passing and package successfully created and working, we will abort the nightly build scr…

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## [Differentiating Subcotatenous and Visceral Fat Tissue](https://discourse.slicer.org/t/differentiating-subcotatenous-and-visceral-fat-tissue/6658)

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**Author:** [@dyasat](https://discourse.slicer.org/u/dyasat)\
**Replies:** 1\
**Last updated:** [May 1, 2019, 12:44pm UTC](https://discourse.slicer.org/t/differentiating-subcotatenous-and-visceral-fat-tissue/6658 "2019-05-01T12:44:03Z")

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Hello Everyone! I am trying to differentiate and measure the volumes of subcotaneous(SC) and visceral fat (V) from 3T T2 MRI images of mice, which are the white areas on this MRI image: FYI: SC is differentiated from…

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## [How to reduce size of the stl file generated through python script?](https://discourse.slicer.org/t/how-to-reduce-size-of-the-stl-file-generated-through-python-script/6414)

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**Author:** [@Siddharth\_Sharma](https://discourse.slicer.org/u/Siddharth_Sharma)\
**Replies:** 4\
**Last updated:** [April 26, 2019, 4:01pm UTC](https://discourse.slicer.org/t/how-to-reduce-size-of-the-stl-file-generated-through-python-script/6414 "2019-04-26T16:01:44Z")

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i am using this script to generate a stl file. i want to reduce the size/quality of the stl file generated through python script. how will i do that?

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## [Volume ImageData access inside CLI module](https://discourse.slicer.org/t/volume-imagedata-access-inside-cli-module/6561)

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**Author:** [@michalikthomas](https://discourse.slicer.org/u/michalikthomas)\
**Replies:** 1\
**Last updated:** [April 23, 2019, 12:12pm UTC](https://discourse.slicer.org/t/volume-imagedata-access-inside-cli-module/6561 "2019-04-23T12:12:15Z")

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Is it possible to access volume imageData inside c++ CLI module?

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