How To Fix LTR2_ES_CHECK120 - Differentiation field '&1' not contained in interface object of '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: LTR2_ES_CHECK - LTR2 Checks on Embedded Specification

• Message number: 120

• Message text: Differentiation field '&1' not contained in interface object of '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LTR2_ES_CHECK120 - Differentiation field '&1' not contained in interface object of '&2' ?

  The SAP error message LTR2_ES_CHECK120 indicates that there is an issue with a differentiation field in the context of an interface object. Specifically, the error message states that the differentiation field (represented by &1) is not included in the interface object (represented by &2). This typically occurs in scenarios involving data extraction, transformation, or loading processes, particularly in SAP BW (Business Warehouse) or SAP HANA environments.
  Cause:
  
  Missing Field in Interface: The differentiation field you are trying to use is not defined in the interface object. This could happen if the field was removed or not included during the design of the interface.
  Incorrect Configuration: The configuration of the data source or the transformation might not align with the fields available in the target object.
  Data Model Changes: Changes in the underlying data model (like changes in InfoObjects or DataSources) that have not been reflected in the interface object can lead to this error.
  
  Solution:
  
  Check Interface Object: Verify the interface object (e.g., DataSource, InfoProvider) to ensure that the differentiation field is indeed included. You can do this by navigating to the relevant transaction (like RSA1 for DataSources) and checking the structure of the interface.
  Update the Interface: If the differentiation field is missing, you may need to update the interface object to include it. This could involve modifying the DataSource or the transformation rules to ensure that all necessary fields are accounted for.
  Re-activate Objects: After making changes, re-activate the DataSource or transformation to ensure that the changes take effect.
  Check for Consistency: Ensure that all related objects (like InfoObjects, DataSources, and transformations) are consistent and correctly configured.
  Consult Documentation: If you are unsure about the changes made to the data model or interface, consult the relevant SAP documentation or your system administrator for guidance.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like RSA1 (Data Warehousing Workbench), RSO2 (DataSource Maintenance), or RSTT (Transformation Maintenance) to check and modify the relevant objects.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide additional guidance on this error.
  Testing: After making changes, perform tests to ensure that the data extraction or loading processes work as expected without triggering the error again.
  
  If the issue persists after following these steps, consider reaching out to SAP support or your internal SAP team for further assistance.