How To Fix /IWPGW/PGW_SERVICE103 - Attribute &1 is not a key for entity &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWPGW/PGW_SERVICE -

• Message number: 103

• Message text: Attribute &1 is not a key for entity &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWPGW/PGW_SERVICE103 - Attribute &1 is not a key for entity &2 ?

  The SAP error message /IWPGW/PGW_SERVICE103 Attribute &1 is not a key for entity &2 typically occurs in the context of SAP Gateway services, particularly when working with OData services. This error indicates that there is an issue with the way the attributes are defined in the OData service, specifically regarding the key attributes of an entity.
  Cause:
  
  Incorrect Key Definition: The attribute specified in the error message (&1) is being used as a key for the entity (&2), but it is not defined as a key in the entity's metadata.
  Model Mismatch: There may be a mismatch between the data model in the backend and the OData service definition. If the OData service is expecting a certain key attribute that is not defined in the underlying data model, this error will occur.
  Service Metadata Issues: The service metadata might not be correctly generated or updated, leading to inconsistencies in the key definitions.
  
  Solution:
  
  
  Check Entity Definition: Go to the Data Model (e.g., in SEGW transaction) and check the entity definition for the specified entity (&2). Ensure that the attribute (&1) is correctly defined as a key attribute.
  
  In the Entity Type, ensure that the attribute is marked as a key.
  
  
  
  Update Service Metadata: If you have made changes to the entity definition, regenerate the service metadata:
  
  In the SEGW transaction, right-click on the service and select "Generate Runtime Objects" or "Regenerate Service".
  
  
  
  Check OData Service Implementation: If you are implementing custom logic, ensure that the key attributes are correctly handled in your implementation.
  
  
  Test the Service: After making the necessary changes, test the OData service again to see if the error persists.
  
  
  Check for Caching Issues: Sometimes, caching can cause issues. Clear the cache or refresh the service in the SAP Gateway.
  
  
  Related Information:
  
  Transaction SEGW: This is the main transaction for managing OData services in SAP Gateway. You can use it to define entities, properties, and their relationships.
  OData Protocol: Understanding the OData protocol and how it defines entities and keys can help in troubleshooting similar issues.
  SAP Gateway Logs: Check the SAP Gateway logs (transaction /IWFND/ERROR_LOG) for more detailed error messages that might provide additional context.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting the SAP Community for further assistance.