Cannot view interface pages What to do when you are unable to view interface pages. Occurs When you are navigating to a web service interface page. Error message HTTP 404 Page not found. Possible causes Oracle InForm Adapter was not installed correctly. By default, the WSDL and the documentation page for a web service are not accessible due to security reasons. Solution Make sure Oracle InForm Adapter is installed correctly. Enable access to WSDL and metadata (for self-hosted environments only). For more information, see the <if> Security Guide. Parent topic: Troubleshooting