How To Fix E0777 - Segment type & is already used in one extension

E0777 - Overview

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 777

• Message text: Segment type & is already used in one extension

What causes this issue?

The segment type &v1& is already being used in an extension, which was
combined with a predecessor of the basic type &v2&. If the basic type
&v2& were combined with the extension, the segment type &v1& would
occur twice since it would be contained in both the basic type and the
extension. However, a segment type can only occur once in an IDoc type.

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 use another segment type.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0777 - Segment type & is already used in one extension ?

  The SAP error message E0777, which states "Segment type & is already used in one extension," typically occurs in the context of SAP's data model extensions, particularly when working with the Business Partner (BP) or Customer/Vendor master data. This error indicates that the segment type you are trying to use is already associated with another extension, which can lead to conflicts in the data model.
  
  Cause:
  
  Duplicate Segment Usage: The segment type you are trying to define or extend is already being used in another extension. In SAP, each segment type should be unique to avoid conflicts in data handling.
  Incorrect Configuration: There may be a misconfiguration in the data model where the same segment type is inadvertently assigned to multiple extensions.
  System Limitations: SAP has certain limitations on how segments can be reused across different extensions, and this error can arise if those limitations are violated.
  
  
  Solution:
  
  Check Existing Extensions: Review the existing extensions in