How To Fix E0758 - Segment type(s) cannot be inserted at the beginning of the IDoc type &

SAP Error Message - Details

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 758

• Message text: Segment type(s) cannot be inserted at the beginning of the IDoc type &

What causes this issue?

In the case of a successor of a basic IDoc type, the first segment of
the basic IDoc type cannot be changed. You therefore cannot insert any
segment types at the beginning of the basic IDoc type &v1&.

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?

Please append the segment type or segment type branch after a segment
type of the basic IDoc type.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0758 - Segment type(s) cannot be inserted at the beginning of the IDoc type & ?

  The SAP error message E0758 indicates that there is an issue with the structure of an IDoc (Intermediate Document) type. Specifically, it states that certain segment types cannot be inserted at the beginning of the IDoc type. This typically occurs when the IDoc structure is not defined correctly according to the rules of the IDoc type.
  Cause:
  
  Incorrect Segment Order: The IDoc type has a defined structure, and certain segments are expected to appear in specific positions. If you attempt to insert a segment that is not allowed at the beginning of the IDoc, this error will occur.
  Segment Type Definition: The segment type you are trying to insert may not be defined to be the first segment in the IDoc structure.
  IDoc Type Configuration: The configuration of the IDoc type in transaction WE30 (IDoc Type Development) may not allow for the segment you are trying to add at the specified position.
  
  Solution:
  
  Check IDoc Structure: Review the IDoc structure in transaction WE30. Ensure that the segment you are trying to insert is allowed at the beginning of the IDoc type.
  Modify Segment Position: If the segment is not allowed at the beginning, consider moving it to a position where it is permitted according to the IDoc type definition.
  Consult Documentation: Refer to the documentation for the specific IDoc type you are working with to understand the required segment order and structure.
  Adjust Segment Types: If necessary, you may need to adjust the segment types or create a new segment that can be placed at the beginning of the IDoc.
  Testing: After making changes, test the IDoc generation again to ensure that the error is resolved.
  
  Related Information:
  
  IDoc Types: IDocs are used for data interchange between SAP systems and external systems. Each IDoc type has a specific structure defined by segments.
  Transaction Codes: 
  
  WE30: Used for creating and modifying IDoc types.
  WE31: Used for creating and modifying segment types.
  WE20: Used for partner profile configuration, which may also affect IDoc processing.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues or provide updates related to IDoc processing.
  
  If you continue to experience issues after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.