Enabling Detailed Error Messages in Windows
IIS — and also using classic ASP — defaults to providing very little error information. Fortunately, you can add a rule to your domain's web.config file to display more detailed error messages.
IIS defaults to providing very little error information if something isn’t working as expected. Fortunately, you can add a rule to your domain’s web.config file to display more detailed messages when you encounter an error. For more information about web.config files, see What Is a web.config File?
Note
These detailed errors are visible to anyone who is viewing your site and encounters an error, and we recommend turning this feature off (by removing the rule) when your site is ready to go live.
- Open your domain’s web.config file. This should be wherever your publicly visible web content is stored. If you don’t have a web.config file already, you can create one in a text editor and upload it via FTP, RDP, or your control panel’s file manager.
- Add the following rule to the web.config file:
<configuration>
<system.webServer>
<httpErrors errorMode="Detailed" /> <asp scriptErrorSentToBrowser="true"/>
</system.webServer>
</configuration>- Make sure to save the file after you are done.