HTTP Error 404.0 – Not Found: Troubleshooting Guide
The HTTP Error 404.0 indicates that the requested resource is unavailable, possibly because it has been removed, renamed, or temporarily inaccessible. Common causes include a nonexistent directory or file, URL typos, or a restrictive module like URLScan.
What You Can Do:
- Verify the URL for any typing errors.
- Ensure the content exists on the web server.
- Implement a tracing rule to analyze failed requests and identify the module responsible for the error.
Technical Insights:
This error is generated by the IIS Web Core, where the notification stems from the MapRequestHandler for static files. The error code is 0x80070002, signifying the absence of the requested resource at the specified physical path.
By addressing these elements, you can effectively resolve the 404 error and ensure optimal site accessibility.
