"The library 'hostpolicy.dll' required" if run from deploy folder, but emitEntryPoint is true

Question

I created a Web API project using the default ASP.NET Core Web Application (.NET Framework) template and then published to local folder using VS.

Now if I call dotnet application.exe in the console, I receive the following error:

A fatal error was encountered. The library 'hostpolicy.dll' required to execute the application was not found

I have found in this answer and this issue on github, that the actual problem is a missing emitEntryPoint property. All is fine, except that my project.json already has "emitEntryPoint": true

What else can cause this error?

Does your application work in Visual Studio debug mode, before publishing? — Nate Barbettini, Jul 12 '16 at 15:08
What happens if you run the published `.exe`, without using `dotnet`? — Nate Barbettini, Jul 12 '16 at 15:17
hm, don't know why I haven't check this, cause it works fine. Thank you. — Set, Jul 12 '16 at 15:21
No problem. Posted it as an answer in case anyone else runs into this! :) — Nate Barbettini, Jul 12 '16 at 15:23

score 16 · Accepted Answer · answered Jul 12 '16 at 15:23

16

Once you publish the application and have a .exe file, you don't need to use dotnet anymore. The application is compiled!

Just run application.exe by double-clicking it, or launching it from the console.

answered Jul 12 '16 at 15:23

Nate Barbettini

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I can't get VS to generate exe even after I publish. Any ideas what could be wrong? – Mayank Aug 13 '18 at 18:55
@Mayank Sounds like your csproj file may not be correct. I'd recommend posting a new question with the contents of your csproj file. – Nate Barbettini Aug 15 '18 at 13:59
@Mayank, can you verify if the .Net core SDK version installed is same as the one specified in global.json file? – sandesh kota Sep 25 '18 at 09:50

score 0 · Answer 2 · answered May 09 '19 at 16:08

0

Make sure you install the correct version of ASP Net Core in the server.

Here is the download link:

https://dotnet.microsoft.com/download/dotnet-core

answered May 09 '19 at 16:08

Wildan Muhlis

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score -2 · Answer 3 · answered Apr 03 '19 at 08:56

-2

We ran in the same problem building our app in CI. Apparantly a reference towards another unittest project slipped in. This Created the error at hand.

answered Apr 03 '19 at 08:56

Tom Tavernier

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"The library 'hostpolicy.dll' required" if run from deploy folder, but emitEntryPoint is true

3 Answers3

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