# Slicer Build error:MSB8066 in Win10
**URL:** https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443
**Category:** Development
**Tags:** build
**Created:** [May 4, 2021, 1:17pm UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443 "2021-05-04T13:17:48Z")
**Posts on this page:** 14
**Page:** 1
### Author:  [@gylucy](https://discourse.slicer.org/u/gylucy)
#### Post date: [May 4, 2021, 1:17pm UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/1 "2021-05-04T13:17:48Z")
Operating system: Win 10
Slicer version: 4.10
Expected behavior:Build slicer successfully
Actual behavior:Build error occured
**the error is:**
50\>D:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(240,5): error MSB8066: “D:\S4R\a1\CMakeFiles\d6c65a9bb95612b23b9f7dfd2809760b\Slicer-mkdir.rule;D:\S4R\a1\CMakeFiles\d6c65a9bb95612b23b9f7dfd2809760b\Slicer-download.rule;D:\S4R\a1\CMakeFiles\d6c65a9bb95612b23b9f7dfd2809760b\Slicer-update.rule;D:\S4R\a1\CMakeFiles\d6c65a9bb95612b23b9f7dfd2809760b\Slicer-patch.rule;D:\S4R\a1\CMakeFiles\d6c65a9bb95612b23b9f7dfd2809760b\Slicer-configure.rule;D:\S4R\a1\CMakeFiles\d6c65a9bb95612b23b9f7dfd2809760b\Slicer-build.rule;D:\S4R\a1\CMakeFiles\d6c65a9bb95612b23b9f7dfd2809760b\Slicer-forceconfigure.rule;D:\S4R\a1\CMakeFiles\d6c65a9bb95612b23b9f7dfd2809760b\Slicer-install.rule;D:\S4R\a1\CMakeFiles\81bb6dc9211ca64d8deb9e385f10b1b4\Slicer-complete.rule;D:\S4R\a1\CMakeFiles\7a1ce418cc5f93f32cda57dd5b58d729\Slicer.rule”的自定义生成已退出，代码为 1。
50\>已完成生成项目“Slicer.vcxproj”的操作 - 失败。
51\>------ 已跳过全部重新生成: 项目: ALL\_BUILD, 配置: Debug x64 ------
51\>没有为此解决方案配置选中要生成的项目
========== 全部重新生成: 成功 47 个，失败 1 个，跳过 3 个 ==========
the file is:
please help me ,I have no solution for it. thanks!
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [May 21, 2021, 6:38pm UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/2 "2021-05-21T18:38:07Z")
Can you build latest Slicer master version using [these build instructions](https://slicer.readthedocs.io/en/latest/developer_guide/build_instructions/windows.html)?
---
### Author:  [@kimble](https://discourse.slicer.org/u/kimble)
#### Post date: [August 11, 2021, 4:20am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/3 "2021-08-11T04:20:44Z")
Hi gylucy
I got MSB8066 error too. Did you solve this problem?
---
### Author:  [@kimble](https://discourse.slicer.org/u/kimble)
#### Post date: [August 11, 2021, 4:35am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/4 "2021-08-11T04:35:26Z")
HI Lassoan
When I build slicer follwoing above guide, I get this MSB8066 error too. May you help to check what is wrong?
The log file could be found with following link
> **[GitHub - shutuzhice/CT](https://github.com/shutuzhice/CT)**
>
> Contribute to shutuzhice/CT development by creating an account on GitHub.
thanks
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [August 11, 2021, 4:45am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/5 "2021-08-11T04:45:15Z")
Which Slicer version are you trying to build?
What is your CPU model?
What build outputs do you get if you start the build again?
---
### Author:  [@kimble](https://discourse.slicer.org/u/kimble)
#### Post date: [August 11, 2021, 5:37am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/6 "2021-08-11T05:37:12Z")
Slicer:4.13.0 (debug)
CPU: Xeon Gold 6128
The 2nd outputs are:
4_7\>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(241,5): error MSB8066: Custom build for ‘C:\D\S4R\CMakeFiles\26b24c13142eddf123c97e3494499225\Slicer-configure.rule;C:\D\S4R\CMakeFiles\26b24c13142eddf123c97e3494499225\Slicer-build.rule;C:\D\S4R\CMakeFiles\26b24c13142eddf123c97e3494499225\Slicer-forceconfigure.rule;C:\D\S4R\CMakeFiles\26b24c13142eddf123c97e3494499225\Slicer-install.rule;C:\D\S4R\CMakeFiles\d0fbb327fb5d8976f542b004b1325aa2\Slicer-complete.rule;C:\D\S4R\CMakeFiles\dbe9d635f197b17f63b9c895eaab2164\Slicer.rule’ exited with code 1._
The whole outputs are uploaded to github too. FYI
>
thanks
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [August 12, 2021, 4:36am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/7 "2021-08-12T04:36:42Z")
It seems that the error is caused by some network connectivity issues:
```auto
47>CMake Error at Base/QTCore/Testing/Cxx/CMakeLists.txt:23 (file):
47> file DOWNLOAD HASH mismatch
47>
47> for file: [C:/D/S4R/Slicer-build/Base/QTCore/Testing/Cxx/Resources/19354-linux-amd64-ScriptedLoadableExtensionTemplate-svn19354-2012-02-23.tar.gz]
47> expected hash: [dd619c9bbd8f058f85c124d775fe5fec1883f05ce4c1025c0f245db1ec088b51]
47> actual hash: [e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855]
47> status: [35;"SSL connect error"]
47>
47>
47>
47>CMake Error at Base/QTCore/Testing/Cxx/CMakeLists.txt:23 (file):
47> file DOWNLOAD HASH mismatch
47>
47> for file: [C:/D/S4R/Slicer-build/Base/QTCore/Testing/Cxx/Resources/19615-macosx-amd64-CLIExtensionTemplate-svn19615-2012-03-18.tar.gz]
47> expected hash: [57d76d876cb96bde01d30a16d42316941209c8b6c22ad311d623d918597141c0]
47> actual hash: [e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855]
47> status: [28;"Timeout was reached"]
47>
47>
47>
47>CMake Error at Base/QTCore/Testing/Cxx/CMakeLists.txt:23 (file):
47> file DOWNLOAD HASH mismatch
47>
47> for file: [C:/D/S4R/Slicer-build/Base/QTCore/Testing/Cxx/Resources/19615-macosx-amd64-LoadableExtensionTemplate-svn19615-2012-03-18.tar.gz]
47> expected hash: [3ce4a2f0485c9f5db56fb48727421fbe9ccef213c345175e8defb573ce2113da]
47> actual hash: [e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855]
47> status: [28;"Timeout was reached"]
```
Maybe your workplace blocks download from github or you have some SSL errors (certificates issue, or using a CMake version that has no SSL support, etc.).
---
### Author:  [@wrx15113330303](https://discourse.slicer.org/u/wrx15113330303)
#### Post date: [April 27, 2022, 3:16am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/8 "2022-04-27T03:16:50Z")
hi there, did you solve this problem? I have the same error.
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [May 30, 2023, 6:00pm UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/9 "2023-05-30T18:00:31Z")
Slicer downloads additional files for testing during the build process. Make sure the CMake can download files from `https://github.com/Slicer/SlicerTestingData/releases/download/...` during build (for example, from [this URL](https://github.com/Slicer/SlicerTestingData/releases/download/SHA256/57d76d876cb96bde01d30a16d42316941209c8b6c22ad311d623d918597141c0)).
---
### Author:  [@Kening\_Zhang](https://discourse.slicer.org/u/Kening_Zhang)
#### Post date: [August 19, 2023, 6:22am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/10 "2023-08-19T06:22:57Z")
Hi, I have same error too. Are there some specific soultions?
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [August 19, 2023, 9:16am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/11 "2023-08-19T09:16:47Z")
If you cannot access github then you may try to use a different internet connection or a VPN.
---
### Author:  [@Kening\_Zhang](https://discourse.slicer.org/u/Kening_Zhang)
#### Post date: [August 19, 2023, 10:36am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/12 "2023-08-19T10:36:38Z")
I tried but it still not work
---
### Author:  [@iwangwangwang](https://discourse.slicer.org/u/iwangwangwang)
#### Post date: [September 14, 2023, 12:44pm UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/13 "2023-09-14T12:44:55Z")
I got the same error and I had use a VPN, but it still didn’t work, sadness ☹
---
### Author:  [@2733845631](https://discourse.slicer.org/u/2733845631)
#### Post date: [April 15, 2024, 10:56am UTC](https://discourse.slicer.org/t/slicer-build-error-msb8066-in-win10/17443/14 "2024-04-15T10:56:48Z")
I tried but it still not work,Are there some specific soultions?