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MSA Segments |
The MSA segment indicates what message is being acknowledged and whether it was successfully received and processed. There are two relevant types of information inside the MSA segment:
| Location | Information | Description |
|---|---|---|
| MSA.1 | Acknowledgment Code | Indicates whether or not the message was successfully received and processed ('AA' for a positive ACK; 'AE' or 'AR' for a negative ACK). |
| MSA.2 | Message Control ID | This represents the unique ID of the message that is being acknowledged. |