How To Fix RAP_CMP_CHECKS079 - Key property &1 removed from entity type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: RAP_CMP_CHECKS - RAP Compatibility Checks Messages

• Message number: 079

• Message text: Key property &1 removed from entity type &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RAP_CMP_CHECKS079 - Key property &1 removed from entity type &2 ?

  The SAP error message RAP_CMP_CHECKS079 indicates that a key property has been removed from an entity type in the context of the RAP (Rapid Application Programming) model. This error typically arises when there is a mismatch between the expected key properties of an entity and the actual definition in the data model.
  Cause:
  
  
  Key Property Removal: The error occurs when a key property that was previously defined in an entity type is no longer present. This can happen due to changes in the data model, such as:
  
  Modifications in the underlying database table.
  Changes in the definition of the entity type in the ABAP CDS (Core Data Services) view.
  Incorrect or incomplete implementation of the RAP model.
  
  
  
  Inconsistent Metadata: If the metadata of the entity type does not match the expected structure, it can lead to this error. This might be due to:
  
  Changes in the data model that were not properly reflected in the RAP definitions.
  Issues during the transport of changes between different systems (e.g., development to production).
  
  
  
  Solution:
  
  
  Review Entity Definition: Check the definition of the entity type in the ABAP CDS view or the RAP model. Ensure that all key properties are correctly defined and that none have been inadvertently removed.
  
  
  Update Metadata: If changes were made to the underlying database or the entity definition, ensure that the metadata is updated accordingly. This may involve:
  
  Adjusting the CDS view to include the necessary key properties.
  Regenerating the RAP artifacts to reflect the current state of the data model.
  
  
  
  Check for Transport Issues: If the error occurred after a transport, verify that all necessary objects were included in the transport request and that there are no inconsistencies between the systems.
  
  
  Consult Documentation: Refer to the SAP documentation for RAP and CDS to ensure that you are following best practices for defining entity types and their key properties.
  
  
  Debugging: If the issue persists, consider debugging the application to trace where the error is being triggered. This can provide insights into what is causing the mismatch.
  
  
  Related Information:
  
  RAP Model: The RAP model is designed to simplify the development of business applications in SAP S/4HANA. Understanding its principles and structure is crucial for troubleshooting issues.
  CDS Views: Core Data Services (CDS) are used to define the data model in SAP. Familiarity with CDS syntax and conventions is essential for managing entity definitions.
  SAP Notes: Check for any relevant SAP Notes or Knowledge Base Articles (KBAs) that may address this specific error or provide additional context.
  
  By following these steps, you should be able to identify the cause of the RAP_CMP_CHECKS079 error and implement a solution to resolve it.