Signing failed with error 800700C1

[alcosml]

This error is reproducible on a DLL file after it was altered as follows:

1. Open the DLL w/ Resource Hacker
2. Replace the PNG resource w/ another PNG file
3. Save & close Resource Hacker

The original file doesn't produce this error; only after altering the file will the error occur. I'm unsure if this is an issue w/ Resource Hacker or AzureSignTool.

[TheOneAndOnlyMonkeyKing]

I'm also getting this error code '800700C1' on my Azure DevOps build pipeline, in my case the DLLs were being used by another process.

[wimmme]

I have the same issue. Not resourcehacker modified, it's done in a Visual Studio build where we add an item to the exe's manifest to allow side by side config with our application without registration. But it's not our exe ...

[MaxZhang-becls]

I have the same issue. There is no problem when I use a PC to sign a DLL file, but when I use a virtual machine to sign a DLL file for the same Build, it will fail