How to troubleshoot "HTTP Error 502.5 - Process Failure" with .NET Core Print

Common causes of this issue:

Troubleshooting Options:

1. Create folder "logs" under your site root folder if it does not exist
2. Open the root web.config file of your site, set stdoutLogEnabled to true

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified" />
    </handlers>
    <aspNetCore processPath="dotnet" arguments=".\Test.dll" stdoutLogEnabled="true" stdoutLogFile=".\logs\stdout" />
  </system.webServer>
</configuration>

You will want to adjust the log level in the appsettings.{environment.}json file in order to capture all log info.

"Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  }

• Please note: after you switch to development mode, your application will read configurations from appsettings.development.json file instead of appsettings.json file.

<configuration>
  <system.webServer>
    <aspNetCore .....>
      <environmentVariables>
        <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="Development" />
      </environmentVariables>
    </aspNetCore>
  </system.webServer>
</configuration>