# SlicerCustomAppTemplate Build Error
**URL:** https://discourse.slicer.org/t/slicercustomapptemplate-build-error/27717
**Category:** Development
**Tags:** build, error, slicercat
**Created:** [February 9, 2023, 9:18am UTC](https://discourse.slicer.org/t/slicercustomapptemplate-build-error/27717 "2023-02-09T09:18:18Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Kaubert](https://discourse.slicer.org/u/Kaubert)
#### Post date: [February 9, 2023, 9:18am UTC](https://discourse.slicer.org/t/slicercustomapptemplate-build-error/27717/1 "2023-02-09T09:18:18Z")
Hi there,
I am having trouble building SlicerCustomAppTemplate while I am not encountering any errors when building the [latest version of Slicer](https://github.com/Slicer/Slicer).
Here is my configuration:
Windows 11
Cmake 3.22.4
Qt 5.15.2
Visual Studio 2022
As defined [here](https://www.kitware.com/slicercat-creating-custom-applications-based-on-3d-slicer/), I downloaded the source folder of SlicerCustomAppTemplate via :
_pip install cookiecutter jinja2-github_
_cookiecutter gh:KitwareMedical/SlicerCustomAppTemplate_
Here I do not change anything in the source folder.
To build I am following steps mentioned [Here](https://slicer.readthedocs.io/en/latest/developer_guide/build_instructions/windows.html#configure-and-build-slicer).
Build error indicates inability to open ‘vtkSlicerSceneViewsModuleLogic.lib’
The Configuration, Generation and Build log files could be find [Here](https://isitwin2022-my.sharepoint.com/:f:/g/personal/kevin_aubert_isitwin_com/EjbbUg0E4z9Pl9gv6IFMhzEBt8PHIYvTQSPXRx3OuRDCaA?e=BV9zvv) as well as errors from Visual Studio.
Can you please help me to solve this error ?
Thank you
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [February 15, 2023, 6:19am UTC](https://discourse.slicer.org/t/slicercustomapptemplate-build-error/27717/2 "2023-02-15T06:19:41Z")
Have a look at the first error. All the other may be consequences of the first one.
As I see, this is the first error:
```auto
14> Syntax error in cmake code at
14>
14> C:/D/S5D/slicersources-build/CTKAppLauncherLib-prefix/tmp/CTKAppLauncherLib-cache-Debug.cmake:19
14>
14> when parsing string
14>
14> C:\Qt\5.15.2\msvc2019_64\lib\cmake\Qt5
14>
14> Invalid escape sequence \Q
```
It means that somewhere you specified Qt path using Windows separators () instead of cross-platform separators (/). The backslash was interpreted somewhere as escape character, which caused the build error.
Try using `C:/Qt/5.15.2/msvc2019_64/lib/cmake/Qt5` as Qt path.
---
### Author:  [@Kaubert](https://discourse.slicer.org/u/Kaubert)
#### Post date: [February 15, 2023, 12:54pm UTC](https://discourse.slicer.org/t/slicercustomapptemplate-build-error/27717/3 "2023-02-15T12:54:42Z")
Dear Lassoan,
Thank you for your response !
I’m now able to build SlicerCAT in 5.2.1 version without errors.
Best regards,
Kevin
---
### Author:  [@jcfr](https://discourse.slicer.org/u/jcfr)
#### Post date: [February 22, 2023, 2:14pm UTC](https://discourse.slicer.org/t/slicercustomapptemplate-build-error/27717/6 "2023-02-22T14:14:23Z")
> [@Kaubert](#):
>
> Build error indicates inability to open ‘vtkSlicerSceneViewsModuleLogic.lib’
This was tentatively addressed in [Slicer@d4723511c](https://github.com/Slicer/Slicer/commit/d4723511cc7d19d8ed1f447a13f749a18e317baf) integrated through [PR-6790](https://github.com/Slicer/Slicer/pull/6790), as we are also experiencing a similar error in a custom application when doing a clean build, I am looking into this.
---
### Author:  [@jcfr](https://discourse.slicer.org/u/jcfr)
#### Post date: [February 23, 2023, 4:48am UTC](https://discourse.slicer.org/t/slicercustomapptemplate-build-error/27717/7 "2023-02-23T04:48:06Z")
This should be fixed in [PR-6834](https://github.com/Slicer/Slicer/pull/6834) that will be integrated shortly.