ClickOnce error after deploying -- has a different computed hash than specified in manifest

Question

Afer deploying my VSTO add-in with ClickOnce, I get the following error message when trying to launch setup.exe:

File, Addin.resources.dll, has a different computed hash than specified in manifest.

Why is this happening? What can I do to fix this?

Answer 1

I was able to resolve this just by doing a clean build and publish. For some reason the manifest wasn't updated like it was supposed to.

Answer 2

I'm using Visual Studio 2013 SP2, and am having the same issue.

Regularly, I will create a new release of our Excel Addin by Rebuilding the solution in VS, signing it, deploying it, but it is uninstallable.

If I then quit Visual Studio, then run Visual Studio again, Rebuild and Redeploy, then it'll work without any problems. Which is fine... but, of course, it means each time I deploy, I need to check that the damn thing will install okay !

It's worrying that VS continues to build installables which quietly contain this issue.

There are plenty of articles mentioning this bug, errr, issue (some from 8 years ago !!), suggesting I need to "rebuild my manifest file", but why doesn't this happen automatically when a do Rebuild in Visual Studio..?

ClickOnce Deployment Issue

ClickOnce Deployment Error

Answer 3

I know this is super old, but putting it here for anyone who comes by in search of an answer.

It is described on https://docs.microsoft.com/en-us/previous-versions/dd465291(v=vs.110)?redirectedfrom=MSDN. I'm adding the main commands here in case the page disappears.

You can add a few commands on your build server to resign the manifest. After publishing, execute each command inside the folder containing the manifest and the vsto, respectively.

mage -sign ExcelWorkbook.dll.manifest -certfile ExcelWorkbook_TemporaryKey.pfx

mage -update ExcelWorkbook.vsto -appmanifest "Application Files\Ex
celWorkbook_1_0_0_0\ExcelWorkbook.dll.manifest" -certfile "Application Files\ExcelWorkbook_1_0_0_0\ExcelWorkbook_TemporaryKey.pfx"