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We use a third party Dll, called EASendMail40.dll, the thing is that when I build the solution on debug mode everything goes perfect, but when release mode it throws 2 errors Hresult: 0x80131515 for two of the projects.

I've being looking for an answer and anything works.

Things I've already tried:

  • Unlock File (file was never locked)
  • Copy the file locally
  • Un-reference and reference again to both of the projects.
  • Add the "LoadFromRemoteSources" tag on the .config.

Additional info:

The error shows an incorrect path to the file, but the .CSProj is correct.

I use the same DLL on another project in the same solution and I have no problems with it.

The solution builds perfect on a workstation, debug and release mode, the problem is when building on the server.

LarsTech
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Pablo Bortolin
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  • does the library have the 'Copy to output directory' set on "Copy Always"? – NicoRiff Feb 23 '17 at 18:39
  • Yes, it is! Just checked. I think I just solve it, I changed the "Generate serialization assembly from "Auto" to "Off" and errors disappear! Whats the function of this option? – Pablo Bortolin Feb 23 '17 at 19:10
  • It is the error code for a NotSupportedException, that doesn't exactly narrow it down. It is pretty common to take shortcuts when setting up a build server, usually to avoid paying for a VS license. Penny wise, three pounds of flesh foolish. When you don't tell us anything about it then you can only get four pounds of guesses. – Hans Passant Feb 23 '17 at 19:12

1 Answers1

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In my case the project was building fine in debug mode, but I couldnt make it build in release mode.

Since the project was a clean clone from git and on my second computer worked well, I knew it was something in local setup. It turs out that I had it cloned on OneDrive. Cloning it to normal local path fixed the issue for me.

So be sure to have it local and not on cloud.

Vojta Mykiska
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