| 000 | No error |
| 001 | The Interchange Control Number in the Header and Trailer Do Not Match. The Value From the Header is Used in the Acknowledgment. |
| 002 | This Standard as Noted in the Control Standards Identifier is Not Supported. |
| 003 | This Version of the Controls is Not Supported |
| 004 | The Segment Terminator is Invalid |
| 005 | Bad Interchange ID Qualifier for Sender |
| 006 | Bad Interchange Sender ID |
| 007 | Bad Interchange ID Qualifier for Receiver |
| 008 | Bad Interchange Receiver ID |
| 009 | Network Provider Could Not Deliver Message Because of Unknown Receiver ID as Qualified |
| 010 | Bad Authorization Information Qualifier Value |
| 011 | Bad Authorization Information Value |
| 012 | Bad Security Information Qualifier Value |
| 013 | Bad Security Information Value |
| 014 | Bad Interchange Date Value |
| 015 | Bad Interchange Time Value |
| 016 | Bad Interchange Standards Identifier Value |
| 017 | Bad Interchange Version ID Value |
| 018 | Bad Interchange Control Number Value |
| 019 | Bad Acknowledgment Requested Value |
| 020 | Bad Test Indicator Value |
| 021 | Bad Number of Included Groups Value |
| 022 | Invalid Control Structure |
| 023 | Improper (Premature) End-of-File (Transmission) |
| 024 | Invalid Interchange Content (e.g. Bad GS Segment) |
| 025 | Duplicate Interchange Control Number |
| 026 | Invalid Data Element Separator |
| 027 | Invalid Subelement Separator |