- <>15 - Unknown Security Originator 
- <>I6 - Implementation Convention Not Supported 
- <>7 - Missing or Invalid Transaction Set Control Number 
- <>25 - S3S Security Start Segment Missing for S3E Security End Segment 
- <>13 - Message Authentication Code Failed 
- <>19 - Invalid Transaction Set Implementation Convention Reference 
- <>12 - Incorrect Message Length (Encryption Only) 
- <>17 - Security Not Supported 
- <>1 - Transaction Set Not Supported 
- <>23 - Transaction Set Control Number Not Unique within the Functional Group 
- <>18 - Transaction Set not in Functional Group 
- <>I5 - Implementation One or More Segments in Error 
- <>4 - Number of Included Segments Does Not Match Actual Count 
- <>26 - S4E Security End Segment Missing for S4S Security Start Segment 
- <>16 - Syntax Error in Decrypted Text 
- <>2 - Transaction Set Trailer Missing 
- <>5 - One or More Segments in Error 
- <>27 - S4S Security Start Segment Missing for S4E Security End Segment 
- <>8 - Authentication Key Name Unknown 
- <>11 - Unknown Security Recipient 
- <>3 - Transaction Set Control Number in Header and Trailer Do Not Match 
- <>24 - S3E Security End Segment Missing for S3S Security Start Segment 
- <>6 - Missing or Invalid Transaction Set Identifier 
- <>9 - Encryption Key Name Unknown 
- <>10 - Requested Service (Authentication or Encrypted) Not Available