An error occurred attempting to determine the process id of dotnet.exe which is hosting your application. One or more error occured

Question

I have clone the project from source url. My friend has developed the asp.net core web application using .NetCore 1.0.0-preview2-003121 sdk. However on my pc I have install .NetCore 1.0.1-preview2-003131 sdk. I am getting the error. I changed the version in the global.json file as you can see below but still no solution.I google it but all the solution are not working for me.

Global.json file

{
  "projects": [ "src", "test" ],
  "sdk": {
    "version": "1.0.0-preview2-003131"
  }
}

Project.json

{
  "userSecretsId": "aspnet-FMM-02f339eb-4af7-42c9-b7f3-d05b48d36811",

  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.0",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Authentication.Cookies": "1.0.0",
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.0",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.EntityFrameworkCore": "1.0.0",
    "Microsoft.AspNetCore.Identity": "1.0.0",
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0",
    "Microsoft.EntityFrameworkCore.Relational": "1.0.0",
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0",
    "Microsoft.EntityFrameworkCore.Design": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Authentication.Facebook": "1.0.0",
    "Microsoft.AspNetCore.Authentication.Google": "1.0.0",
    "MailKit": "1.8.1",
    "NLog.Extensions.Logging": "1.0.0-*",
    "System.Data.SqlClient": "4.1.0"
  },

  "tools": {
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
    "Microsoft.Extensions.SecretManager.Tools": "1.0.0-preview2-final",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "portable-net45+win8"
      ]
    }
  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true,
    "xmlDoc": false
  },

  "runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "Views",
      "Areas/**/Views",
      "appsettings.json",
      "web.config",
      "nlog.config"
    ]
  },

  "scripts": {
    "prepublish": [ "bower install" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

Dot net version in my pc

How can I solve this issue. Please can anyone let me know about this. [ enter image description here

[ enter image description here

What is the error message you get when you run dotnet build on the directory where the project is located (i.e., the directory where project.json is located)? Also, without knowing the error message you're getting... can you comment out "sdk": { "version": "1.0.0-preview2-003131" } from global.json and try as well? — kimbaudi
@kimbaudi I comment the sdk same error. I have uploaded the error screen shots. Please have a look — San Jaisy
I was hoping you can open your Command Prompt and cd /d "D:\fish\FishermansMate\src\FMM". Then enter dotnet build and then dotnet run. Can you try? Based on your screenshot of Visual Studio Output, it looks like you have another process running dotnet, which means you might want to restart your PC and try running it again. That might solve your problem. — kimbaudi
try deleting the bin and obj folders. also try deleting project.lock.json. after that, restart Visual Studio and rebuild the project. — kimbaudi

Shaun Luttin Shaun Luttin · Accepted Answer · 2016-12-10T04:59:01

An error occurred attempting to determine the process id of dotnet.exe which is hosting your application. One or more errors occurred.

That problem can occur when three things are true:

your app is trying to run with SSL,
your app does not have an SSL Certificate setup, and
you are debugging your app (which is preventing SSL certificate setup).

As a quick fix attempt, run the app without debugging via Ctrl + F5 or view the app in the browser via Ctrl + Shift + W. That might install the SSL certificate for you. If it does not, consider changing your app's launch settings from HTTPS to HTTP. If you really need SSL, you'll have to figure out how to install and use an SSL certificate on your local machine.

Checkout out these on GitHub and StackOverflow.

An error occurred attempting to determine the process id of dotnet.exe which is hosting your application. One or more error occured

20 Answers

Make sure your IP address hasn't changed (if using a DNS name)