# SlicerCAT build issues.

**URL:** <https://discourse.slicer.org/t/slicercat-build-issues/15236>\
**Category:** Development\
**Created:** [December 27, 2020, 1:41am UTC](https://discourse.slicer.org/t/slicercat-build-issues/15236 "2020-12-27T01:41:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sherinsugathan](https://avatars.discourse-cdn.com/v4/letter/s/b5ac83/32.png) [@sherinsugathan](https://discourse.slicer.org/u/sherinsugathan)\
**Post date:** [December 27, 2020, 1:41am UTC](https://discourse.slicer.org/t/slicercat-build-issues/15236/1 "2020-12-27T01:41:58Z")

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Hi,  
I am trying to build SlicerCAT on my Windows 10 machine.  
CMake went through without any problem.  
I have Qt(v5.12) already installed.

After building the solution file in visual studio I got a linking error related to Qt (attached)

 ![error](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/b/0/b045c71211951e804f2fd939a9d64d6f0200b267.png)

When I went back to Cmake, I saw a variable “Slicer\_REQUIRED\_QT\_VERSION” assigned with a value 5.6.0.  
Obviously mine is a v5.12 of Qt. Would that be a problem? Should I uninstall Qt-v5.12 and install a Qt-v5.6?

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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:** [December 27, 2020, 1:46am UTC](https://discourse.slicer.org/t/slicercat-build-issues/15236/2 "2020-12-27T01:46:50Z")

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Current build instructions are available here: [https://slicer.readthedocs.io/en/latest/developer\_guide/build\_instructions/windows.html](https://slicer.readthedocs.io/en/latest/developer_guide/build_instructions/windows.html)

If you follow the instructions word by word then the build will succeed.