How To Fix E0770 - Invalid segment type & - name must begin with & or &

E0770 - Overview

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 770

• Message text: Invalid segment type & - name must begin with & or &

What causes this issue?

Invalid segment type &v1&, name must begin with &v2& or &v3&

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0770 - Invalid segment type & - name must begin with & or & ?

  The SAP error message E0770, which states "Invalid segment type & - name must begin with & or &," typically occurs in the context of IDoc processing or when working with segments in an IDoc structure. This error indicates that the segment type defined in the IDoc does not conform to the expected naming conventions.
  
  Cause:
  
  Invalid Segment Name: The segment name does not start with the required characters. In SAP IDocs, segment names must begin with specific characters (usually a letter or underscore).
  Incorrect Configuration: The IDoc type or segment type may not be correctly configured in the system.
  Data Mapping Issues: If you are using a custom IDoc or mapping data from an external system, the segment names may not match the expected format.
  
  
  Solution:
  
  Check Segment Names: Review the segment names in your IDoc definition. Ensure that they start with the correct characters as per SAP's naming conventions.
  Review IDoc Configuration: Go to transaction