# Slicer 4.9.0 build error

**URL:** <https://discourse.slicer.org/t/slicer-4-9-0-build-error/3518>\
**Category:** Support\
**Created:** [July 19, 2018, 2:07am UTC](https://discourse.slicer.org/t/slicer-4-9-0-build-error/3518 "2018-07-19T02:07:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![shellyverde](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/shellyverde/32/1186_2.png) [@shellyverde](https://discourse.slicer.org/u/shellyverde)\
**Post date:** [July 19, 2018, 2:07am UTC](https://discourse.slicer.org/t/slicer-4-9-0-build-error/3518/1 "2018-07-19T02:07:13Z")

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Operating system: Windows 10  
Slicer version: 4.9.0 check out on July 15, 2018  
Expected behavior: Build slicer successfully  
Actual behavior: Build error occured

Use VS 2013 to build, QT 4.8.7. Build mode: debug, x64.  
The following error reported:  
…\Modules\Loadable\VolumeRendering\MRMLDM\vtkMRMLVolumeRenderingDisplayableManager.cxx(52): fatal error C1083: Cannot open include file: ‘vtkMultiVolume.h’: No such file or directory […\Slicer-build\Modules\Loadable\VolumeRendering\MRMLDM\vtkSlicerVolumeRenderingModuleMRMLDisplayableManager.vcxproj]  
53\>

Any help is appreciated.  
Thanks,

-Shelly

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 19, 2018, 5:37am UTC](https://discourse.slicer.org/t/slicer-4-9-0-build-error/3518/2 "2018-07-19T05:37:38Z")

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Thanks for reporting this.

As described on the [Slicer build instructions page](https://www.slicer.org/wiki/Documentation/Nightly/Developers/Build_Instructions), recent Slicer nightly versions require Qt5 and VTK9 now.

To allow more time for transitioning, we make Slicer-4.9 compatible with Qt4 and VTK7 as well. However, we don’t have nightly dashboards for this configuration, so we may not see regressions immediately.

I’ve fixed the build error in r27287. If you update Slicer source code to the latest trunk/master version then build should succeed.

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**Author:** ![shellyverde](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/shellyverde/32/1186_2.png) [@shellyverde](https://discourse.slicer.org/u/shellyverde)\
**Post date:** [July 19, 2018, 11:56am UTC](https://discourse.slicer.org/t/slicer-4-9-0-build-error/3518/3 "2018-07-19T11:56:39Z")

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Hi Dr. Lasso,

Thanks for the quick fix! The build is working now.

-Shelly

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 19, 2018, 2:02pm UTC](https://discourse.slicer.org/t/slicer-4-9-0-build-error/3518/4 "2018-07-19T14:02:44Z")

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Great, thanks for letting us know. I would recommend to upgrade your build infrastructure to use Qt5 (this will also switch Slicer’s VTK version to VTK9), as we will drop Qt4 support after releasing Slicer-4.10.