1        Transaction Set Not Supported
2        Transaction Set Trailer Missing
3        Transaction Set Control Number in Header and Trailer Do Not Match
4        Number of Included Segments Does Not Match Actual Count
5        One or More Segments in Error
6        Missing or Invalid Transaction Set Identifier
7        Missing or Invalid Transaction Set Control Number
8        Authentication Key Name Unknown
9        Encryption Key Name Unknown
10       Requested Service (Authentication or Encrypted) Not Available
11       Unknown Security Recipient
12       Incorrect Message Length (Encryption Only)
13       Message Authentication Code Failed
15       Unknown Security Originator
16       Syntax Error in Decrypted Text
17       Security Not Supported
19       S1E Security End Segment Missing for S1S Security Start Segment
20       S1S Security Start Segment Missing for S1E Security End Segment
21       S2E Security End Segment Missing for S2S Security Start Segment
22       S2S Security Start Segment Missing for S2E Security End Segment
23       Transaction Set Control Number Not Unique within the Functional Group
24       S3E Security End Segment Missing for S3S Security Start Segment
25       S3S Security Start Segment Missing for S3E Security End Segment
26       S4E Security End Segment Missing for S4S Security Start Segment
27       S4S Security Start Segment Missing for S4E Security End Segment