# Paraview build: xmlpatterns could not find a Qt
**URL:** https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389
**Category:** ParaView Support
**Created:** [February 13, 2023, 10:30am UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389 "2023-02-13T10:30:31Z")
**Posts on this page:** 13
**Page:** 1
### Author:  [@kskollepara](https://discourse.paraview.org/u/kskollepara)
#### Post date: [February 13, 2023, 10:30am UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/1 "2023-02-13T10:30:31Z")
I am trying to build para view from sources on Ubuntu 22.04.
`cmake -GNinja -DPARAVIEW_USE_PYTHON=ON -DPARAVIEW_USE_MPI=ON -DVTK_SMP_IMPLEMENTATION_TYPE=TBB -DCMAKE_BUILD_TYPE=Release ../paraview`
However, I receive the following error:
> [30/21172] Generating documentation for SLACTools\_doc
> FAILED: Plugins/SLACTools/paraview\_help/SLACTools\_doc.xslt /home/user/appimages/paraview\_build/Plugins/SLACTools/paraview\_help/SLACTools\_doc.xslt
> cd /home/user/appimages/paraview\_build/Plugins/SLACTools/paraview\_help && /usr/bin/cmake -Dxmlpatterns=/usr/bin/xmlpatterns -Doutput\_dir=/home/user/appimages/paraview\_build/Plugins/SLACTools/paraview\_help -Doutput\_file=/home/user/appimages/paraview\_build/Plugins/SLACTools/paraview\_help/SLACTools\_doc.xslt -Dxmls\_file=/home/user/appimages/paraview\_build/Plugins/SLACTools/CMakeFiles/SLACTools\_doc-xmls.txt -D\_paraview\_generate\_proxy\_documentation\_run=ON -P /home/user/appimages/paraview/CMake/ParaViewClient.cmake
> CMake Error at /home/user/appimages/paraview/CMake/ParaViewClient.cmake:592 (message):
> Failed to convert servermanager XML: xmlpatterns: could not find a Qt
> installation of ‘’
>
> [39/21172] Building CXX object VTK/Filters/Sources/CMakeFiles/FiltersSources.dir/vtkPartitionedDataSetCollectionSource.cxx.o
> ninja: build stopped: subcommand failed.
As the system installation of Qt5 didn’t work, I installed Qt5 from sources. Then I add a flag to `cmake` to specify the new installation of Qt5: `-DQt5_DIR=/home/user/appimages/qt5_build/5.11.3/gcc_64/lib/cmake/Qt5`.
However, a quick look at the `cmake-gui` (screenshot below) shows that some Qt5 flags point to the new path, but the `Qt5_DIR` and `Qt5Svg_DIR` still point to the system installation.
I found this weird, but I proceed to compile using `ninja` and still receive the same error message.
Kindly help
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 13, 2023, 10:34am UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/2 "2023-02-13T10:34:34Z")
Looks like your are missing xmlpatterns in your Qt installation. You can disabled the SLACTools plugin to work around the issue if needed.
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### Author:  [@kskollepara](https://discourse.paraview.org/u/kskollepara)
#### Post date: [February 13, 2023, 12:03pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/3 "2023-02-13T12:03:34Z")
Thank you for your response. I included the flag `-DPARAVIEW_PLUGIN_ENABLE_SLACTools=0`, but I still receive the same error. Are there any other plugins that I should disable?
> [16788/21140] Generating documentation for AcceleratedAlgorithms\_doc
> FAILED: Plugins/AcceleratedAlgorithms/paraview\_help/AcceleratedAlgorithms\_doc.xslt /home/kiran/appimages/paraview\_build/Plugins/AcceleratedAlgorithms/paraview\_help/AcceleratedAlgorithms\_doc.xslt
> cd /home/kiran/appimages/paraview\_build/Plugins/AcceleratedAlgorithms/paraview\_help && /usr/bin/cmake -Dxmlpatterns=/usr/bin/xmlpatterns -Doutput\_dir=/home/kiran/appimages/paraview\_build/Plugins/AcceleratedAlgorithms/paraview\_help -Doutput\_file=/home/kiran/appimages/paraview\_build/Plugins/AcceleratedAlgorithms/paraview\_help/AcceleratedAlgorithms\_doc.xslt -Dxmls\_file=/home/kiran/appimages/paraview\_build/Plugins/AcceleratedAlgorithms/CMakeFiles/AcceleratedAlgorithms\_doc-xmls.txt -D\_paraview\_generate\_proxy\_documentation\_run=ON -P /home/kiran/appimages/paraview/CMake/ParaViewClient.cmake
> CMake Error at /home/kiran/appimages/paraview/CMake/ParaViewClient.cmake:592 (message):
> Failed to convert servermanager XML: xmlpatterns: could not find a Qt
> installation of ‘’
>
> [16789/21140] Generating documentation for AnalyzeNIfTIReaderWriter\_doc
> FAILED: Plugins/AnalyzeNIfTIReaderWriter/paraview\_help/AnalyzeNIfTIReaderWriter\_doc.xslt /home/kiran/appimages/paraview\_build/Plugins/AnalyzeNIfTIReaderWriter/paraview\_help/AnalyzeNIfTIReaderWriter\_doc.xslt
> cd /home/kiran/appimages/paraview\_build/Plugins/AnalyzeNIfTIReaderWriter/paraview\_help && /usr/bin/cmake -Dxmlpatterns=/usr/bin/xmlpatterns -Doutput\_dir=/home/kiran/appimages/paraview\_build/Plugins/AnalyzeNIfTIReaderWriter/paraview\_help -Doutput\_file=/home/kiran/appimages/paraview\_build/Plugins/AnalyzeNIfTIReaderWriter/paraview\_help/AnalyzeNIfTIReaderWriter\_doc.xslt -Dxmls\_file=/home/kiran/appimages/paraview\_build/Plugins/AnalyzeNIfTIReaderWriter/CMakeFiles/AnalyzeNIfTIReaderWriter\_doc-xmls.txt -D\_paraview\_generate\_proxy\_documentation\_run=ON -P /home/kiran/appimages/paraview/CMake/ParaViewClient.cmake
> CMake Error at /home/kiran/appimages/paraview/CMake/ParaViewClient.cmake:592 (message):
> Failed to convert servermanager XML: xmlpatterns: could not find a Qt
> installation of ‘’
>
> [16797/21140] Building CXX object VTK/ThirdParty/vtkm/vtkvtkm/vtk-m/vtkm/filter/contour/CMakeFiles/vtkm\_filter\_contour.dir/Contour.cxx.o
> ninja: build stopped: subcommand failed.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 13, 2023, 12:07pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/4 "2023-02-13T12:07:53Z")
Then you want to install xmlpatterns
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### Author:  [@kskollepara](https://discourse.paraview.org/u/kskollepara)
#### Post date: [February 13, 2023, 12:11pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/5 "2023-02-13T12:11:22Z")
They are already installed using the system package manager. Is there any test I can perform to check if it works correctly?
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 13, 2023, 12:12pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/6 "2023-02-13T12:12:34Z")
Looking at your CMake gui image, it looks like you have multiple version of Qt installed that conflicts with each other.
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### Author:  [@kskollepara](https://discourse.paraview.org/u/kskollepara)
#### Post date: [February 13, 2023, 12:18pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/7 "2023-02-13T12:18:25Z")
That’s because I was trying a Qt built from sources in order to remove this error (as I mentioned in my question). Since, it didn’t work, I am now using the system Qt entirely, but still have the error
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 13, 2023, 12:23pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/8 "2023-02-13T12:23:23Z")
Is `xmlpatterns` in your path ?
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### Author:  [@kskollepara](https://discourse.paraview.org/u/kskollepara)
#### Post date: [February 13, 2023, 12:23pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/9 "2023-02-13T12:23:47Z")
yes
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 13, 2023, 12:25pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/10 "2023-02-13T12:25:21Z")
At this point, it is needed to try and debug what is happing in the cmake code trying to use xmlpatterns.
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### Author:  [@kskollepara](https://discourse.paraview.org/u/kskollepara)
#### Post date: [February 13, 2023, 12:28pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/11 "2023-02-13T12:28:27Z")
How can I proceed to do that? I am not familiar with cmake.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [February 13, 2023, 12:35pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/12 "2023-02-13T12:35:04Z")
Definitely not trivial for anyone not familiar with CMake. Do not hesitate to reach out to Kitware for professional support if needed. [https://www.kitware.eu/get-support/](https://www.kitware.eu/get-support/)
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### Author:  [@kskollepara](https://discourse.paraview.org/u/kskollepara)
#### Post date: [February 13, 2023, 12:35pm UTC](https://discourse.paraview.org/t/paraview-build-xmlpatterns-could-not-find-a-qt/11389/13 "2023-02-13T12:35:47Z")
Okay, thank you