an error occurred while starting the application after publishing dot net core 2 app

Question

After publishing my .net core 2 app on IIS 7.5 I get this error:

an error occurred while starting the application.

Is there any way to force dot net core to submit a accurate error message rather than such general message?

Answer 1

I found this link helpful: How to troubleshoot: “An error occurred.... In summary:

1. In the <aspNetCore> element of your web.config, set stdoutLogEnabled to true.

<aspNetCore processPath=".\myapp.exe"
            stdoutLogEnabled="true"
            stdoutLogFile=".\logs\stdout" />

2. Create your log folder.

   Example: Given stdoutLogFile=".\logs\stdout", create logs\ in your application root directory. .\logs\ is the directory where logs will be stored, and is configurable to your preference. stdout is a static value that'll be prepended to all file names in the log folder.

3. Run your request and open the log file.

Additional information on the ASP.NET Core module: ASP.NET Core Module

Don't forget to disable logging once done!

Answer 2

You can try to start your application directly on your IIS Server via the console.

dotnet myapp.dll

You should get a much more verbose error there.