Support for Failure/Exception Handling Framework
AMF can now handle errors that occur during procedures. The messaging between the AMF-Service and the protocols have enough information so that when an error reaches the AMF-Service, it can determine:
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Whether the error was internal (for example, node selection failure, NRF discovery failure) or a NOT OK status code was returned by a protocol.
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The protocol or entity that generated the error.
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An error code itself