46,303 questions
Certificates are the same as in the previous installed vsbt 16.7.6.
But I have found the solution. I had to totally ununstall the 16.7.6 version first!!!
Visual Studion 2019 Build Tools Offline Installer feed error
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 28.999999999999996%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Александр Розенбаум
11
Reputation points
Hello! I have got this problem twice.
I need to install modern Visual Studio 2019 Build Tools in the isolated location.
On the Internet-connected PC I have made the offline install folder using this command:
vs_buildtools__605930698.1593373046.exe --add Microsoft.VisualStudio.Workload.MSBuildTools --layout .\buildTools2019offline --lang en-US
It contains signed Catalog.json with info:
"info":{"id":"VisualStudio/16.8.3+30804.86","buildBranch":"d16.8","buildVersion":"16.8.30804.86","localBuild":"build-lab","manifestName":"VisualStudio","manifestType":"installer","productDisplayVersion":"16.8.3","productLine":"Dev16","productLineVersion":"2019","productMilestone":"RTW","productMilestoneIsPreRelease":"False","productName":"Visual Studio","productPatchVersion":"3","productPreReleaseMilestoneSuffix":"1.0","productSemanticVersion":"16.8.3+30804.86"}
Also it contains the following definition:
{"id":"Microsoft.Build.UnGAC","version":"16.8.2.2056705","type":"Exe","chip":"neutral","language":"neutral","payloads":[{"fileName":"Microsoft.Build.UnGAC.exe","sha256":"28b4ed53312f7b426f51f2bdb85967bcb4a3e38afa7edff1ed686ed435a90227","size":7168,"url":"https://download.visualstudio.microsoft.com/download/pr/43bd58d8-f07b-4314-a32a-f72be07febaa/28b4ed53312f7b426f51f2bdb85967bcb4a3e38afa7edff1ed686ed435a90227/Microsoft.Build.UnGAC.exe","signer":{"$ref":"1"}}],"installParams":{"fileName":"[Payload]"},"repairParams":{"fileName":"[Payload]"},"installSizes":{}}
But in reality this file was downloaded with length 16288 bytes. Also it can be downloaded manually by the URL with same result. But the SHA256 hash of downloaded file is correct! (28B4ED53312F7B426F51F2BDB85967BCB4A3E38AFA7EDFF1ED686ED435A90227 using powershell's Get-FileHash)
So, this package can't be installed in the isolated location. It seems that from the HTTP feed only file hash is validated during installation process, but from the local folder file length is checked prior the hash validation.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 78%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETS%3C/text%3E%3C/svg%3E)
Tianyu Sun-MSFT 34,451 Reputation points Microsoft External Staff2020-12-23T05:39:55.657+00:00 Hi @Александр Розенбаум , thank you for taking time to post this issue in Microsoft Q&A forum. I can reproduce your issue on my side, and I think there are two possibilities, one is that this
sizehas a special meaning or indicates to some detailed size, and the other is that this issue may be a potential issue and needs to be fixed. I have reported this issue to Visual Studio Product Team in our Developer Community. This is the link, please kindly follow that thread and get more information there. -
Александр Розенбаум 11 Reputation points
2020-12-23T06:39:02.15+00:00 I have checked. Size is incorrect in many (may be all?) files. But problems with offline installing are also with Microsoft.VisualStudio.NuGet.BuildTools
Installer is trying to download it from Internet for 9 times and fails. -
Tianyu Sun-MSFT 34,451 Reputation points Microsoft External Staff
2020-12-23T08:16:53.96+00:00 Hi @Александр Розенбаум , thank you for your feedback. I think you need to check if the packages files are completely downloaded firstly. You can use this command line parameter
--verifyto verify a layout like “vs_buildtools__605930698.1593373046.exe --layout XXXX\buildTools2019offline --verify”, and it will print the list of missing files and invalid files. -
Александр Розенбаум 11 Reputation points
2020-12-23T08:31:17.66+00:00 I have verified it triple. Also I have manually verified SHA256 hashcodes of downloaded problem files against the info from Catalog.json and found that they are correct.
Downloaded distribitive for version 16.7.6 works like a charm. But 16.8.x are broken.
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Tianyu Sun-MSFT 34,451 Reputation points Microsoft External Staff
2020-12-23T09:20:46.473+00:00 Hi @Александр Розенбаум , did you also try to refresh certificates when offline installing? Please kindly check this document: Install certificates required for Visual Studio offline installation, and try to refresh certificates, as “The Visual Studio setup engine installs only content that is trusted. … Visual Studio setup therefore requires that several standard Microsoft root and intermediate certificates are installed and up-to-date on a user’s machine. If the machine has been kept up to date with Windows Update, signing certificates usually are up to date. If the machine is connected to the internet, during installation Visual Studio may refresh certificates as necessary to verify file signatures. If the machine is offline, the certificates must be refreshed another way.”
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