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

SAP Error Message - Details

• 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 WE30 (IDoc Types) and check the definition of the IDoc type you are working with. Ensure that all segments are correctly defined.
  Adjust Mapping: If you are using middleware or a custom program to send IDocs, ensure that the mapping of segment names is correct and adheres to the naming conventions.
  Test with Standard IDocs: If possible, test with standard IDocs to see if the issue persists. This can help isolate whether the problem is with custom segments or configurations.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on IDoc segment naming conventions.
  
  Related Information:
  
  IDoc Structure: IDocs consist of a control record, data records, and status records. Each data record is made up of segments, which must be defined correctly.
  Transaction Codes: 
  
  WE30: To view and edit IDoc types.
  WE31: To view and edit segment types.
  WE20: To configure partner profiles for IDoc processing.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.