Schema error
messageId missing, empty or longer than 70 characters
Symptom
Schema error on commonTechnical/0/messageId: 'must have required property' or 'must NOT have more than 70 characters'.
Cause
The sending application does not fill a unique message identification, or uses a composite key that exceeds the length. Since v1.2.0 the length of messageId equals that of originalMessageId (70).
Fix
Generate per message a unique, stable identification of at most 70 characters (for example message type, date and sequence number) and store it: feedback and corrections refer to it.
Wrong and right
Wrong
{ "commonTechnical": [ { "entityType": "default", "creationDateTime": "2026-09-30T17:00:00Z" } ] }Right
{ "commonTechnical": [ { "entityType": "default", "messageId": "0001A-20260930-000001", "creationDateTime": "2026-09-30T17:00:00Z", "testMessage": false } ] }Check your own message for this and all other errors with the free validator: schema, code lists and consistency checks in one report.Validate a message
