How To Fix DT289 - Key field & references a class or interface

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 289

• Message text: Key field & references a class or interface

What causes this issue?

A class or interface is referenced in key field &V1&.

System Response

The structure is not activated. You can only work with concrete values,
but not with references, in key fields.

How to fix this error?

Only use data elements, direct type entries, or structures.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT289 - Key field & references a class or interface ?

  The SAP error message DT289 typically indicates that there is an issue with a key field in a data structure that references a class or interface. This error can occur in various contexts, such as when working with ABAP programs, data dictionary objects, or when trying to activate or transport objects in the SAP system.
  Cause:
  
  Key Field Definition: The key field may not be properly defined in the data dictionary. This can happen if the field is not marked as a key field in the table or structure definition.
  Class/Interface Reference: The key field might be referencing a class or interface that is not correctly implemented or does not exist in the system.
  Inconsistent Data Model: There may be inconsistencies in the data model, such as missing dependencies or incorrect relationships between objects.
  Transport Issues: If the error occurs during a transport, it could be due to missing objects in the transport request.
  
  Solution:
  
  Check Data Dictionary: Verify the definition of the data structure or table in the Data Dictionary (SE11). Ensure that the key fields are correctly defined.
  Review Class/Interface: Check if the class or interface referenced by the key field exists and is correctly implemented. You can do this using transaction SE24 (for classes) or SE80 (for interfaces).
  Activate Objects: If there are any inactive objects related to the class or interface, activate them. Sometimes, activating the related objects can resolve the issue.
  Check Dependencies: Ensure that all dependencies are correctly defined and that there are no missing references.
  Transport Request: If the error occurs during a transport, check the transport request for completeness. Ensure that all necessary objects are included in the transport.
  Debugging: If the issue persists, consider debugging the program or transaction that is causing the error to identify the exact point of failure.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE24 (Class Builder), SE80 (Object Navigator).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation for guidelines on defining key fields and working with classes and interfaces.
  
  If the problem continues after following these steps, it may be beneficial to consult with your SAP Basis or ABAP development team for further assistance.