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

E0758 - Overview

• 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.

E0758 - Details

• 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: