How To Fix E0779 - Names of segment types of the predecessor IDoc type cannot be changed

E0779 - Overview

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 779

• Message text: Names of segment types of the predecessor IDoc type cannot be changed

What causes this issue?

The name of the segment type is already defined in the predecessor
&v1&. It can therefore not be changed.

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 E0779 - Names of segment types of the predecessor IDoc type cannot be changed ?

  The SAP error message E0779, which states "Names of segment types of the predecessor IDoc type cannot be changed," typically occurs when there is an attempt to modify the segment types of an IDoc type that has already been defined and is in use. This error is related to the IDoc (Intermediate Document) structure in SAP, which is used for data interchange between SAP systems and external systems.
  
  Cause:
  
  Modification of Existing IDoc Type: The error arises when you try to change the names of segment types in an IDoc type that has already been created and possibly used in transactions or processes.
  Predecessor IDoc Type: If the IDoc type you are trying to modify is based on a predecessor IDoc type, the system restricts changes to ensure data integrity and consistency.
  Dependencies: There may be existing dependencies, such as mappings or configurations, that rely on the original segment names.
  
  
  Solution:
  
  Create a New IDoc Type: