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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.

  3. Fix problems signing in to AOL Mail

    help.aol.com/articles/fix-problems-signing-in-to...

    Sometimes the old "turn it off and on again" actually works. In this case, try completely signing out of your account then sign back in. Many times, this will help, especially in cases of bad passwords or some simple browser issues.

  4. HRESULT - Wikipedia

    en.wikipedia.org/wiki/HRESULT

    HRESULT is defined in a system header file as a 32-bit, signed integer [1] and is often treated opaquely as an integer, especially in code that consumes a function that returns HRESULT. A HRESULT value consists of the following separate items: Severity: indicates whether the function succeeded or failed

  5. HTTP 402 - Wikipedia

    en.wikipedia.org/wiki/HTTP_402

    The designation of the 402 status implies that a payment is mandated to obtain a particular resource or service. However, its tentative status indicates limited mainstream adoption. Web developers and institutions are advised to adhere to recognized HTTP norms and employ stable, thoroughly documented status codes.

  6. List of FTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_FTP_server_return...

    Service available, closing control connection. This may be a reply to any command if the service knows it must shut down. 425: Can't open data connection. 426: Connection closed; transfer aborted. 430: Invalid username or password 431: Need some unavailable resource to process security. 434: Requested host unavailable. 450: Requested file ...

  7. HTTP 403 - Wikipedia

    en.wikipedia.org/wiki/HTTP_403

    A 403 status code can occur for the following reasons: [4] Insufficient permissions: The most common reason for a 403 status code is that the user lacks the necessary permissions to access the requested resource.

  8. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    In code 404, the first digit indicates a client error, such as a mistyped Uniform Resource ... Text is available under the Creative Commons Attribution-ShareAlike ...

  9. Exception handling - Wikipedia

    en.wikipedia.org/wiki/Exception_handling

    An exception handling mechanism allows the procedure to raise an exception [2] if this precondition is violated, [1] for example if the procedure has been called on an abnormal set of arguments. The exception handling mechanism then handles the exception. [3] The precondition, and the definition of exception, is subjective.