# Slicer build failed in windows 10, numpy patch problem

**URL:** https://discourse.slicer.org/t/slicer-build-failed-in-windows-10-numpy-patch-problem/1424
**Category:** Development
**Created:** [November 9, 2017, 8:55pm UTC](https://discourse.slicer.org/t/slicer-build-failed-in-windows-10-numpy-patch-problem/1424 "2017-11-09T20:55:25Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![brhoom](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/brhoom/32/1228_2.png) [@brhoom](https://discourse.slicer.org/u/brhoom)
#### Post date: [November 9, 2017, 8:55pm UTC](https://discourse.slicer.org/t/slicer-build-failed-in-windows-10-numpy-patch-problem/1424/1 "2017-11-09T20:55:25Z")

</div>

Dear all,  
I am trying to build a release type build of Slicer -r 26489 source code in windows 10 using visual studio 2013 update 5.  
The build fail because of Numpy. I got this error when I try to build numpy:

```
16> -- Applying 'numpy-01-system_info-fix-clang.patch' - failed
16> CMake Error at C:/sw/Slicer4.8/Slicer-r26489/CMake/SlicerPatch.cmake:54 (message):
16>    
16>  
16>    
16>  
16> This application has requested the Runtime to terminate it in an unusual
16> way.
16>  
16> Please contact the application's support team for more information.
16>  
16> Assertation failed!
16>  
16>    
16>  
16> Program: C:\Strawberry\c\bin\patch.exe
16>  
16> File: .\src\patch\2.5.9\patch-2.5.9-src\patch.c, Line 354
16>  
16>    
16>  
16> Expression: hunk 
16>  
16>  
16>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.CppCommon.targets(170,5): error MSB6006: "cmd.exe" exited with code 1.
========== Build: 15 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

```

note: The debug build was successful but I had to disable SimpleITK.  
Thanks for your input.