How To Fix /IWBEP/CM_MGW_APPS021 - Source keys are missing for entity set &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_APPS -

• Message number: 021

• Message text: Source keys are missing for entity set &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_APPS021 - Source keys are missing for entity set &1 ?

  The SAP error message /IWBEP/CM_MGW_APPS021 indicates that source keys are missing for a specific entity set in an OData service. This typically occurs when the OData service is trying to process a request for an entity set, but it cannot find the necessary keys to identify the specific records.
  Cause:
  
  Missing Key Fields: The entity set being accessed does not have the required key fields defined in the OData service metadata.
  Incorrect Request: The request being sent to the OData service may not include the necessary key parameters.
  Service Configuration Issues: There may be issues with the configuration of the OData service or the underlying data model.
  Data Model Changes: If there have been recent changes to the data model (e.g., adding or removing key fields), the OData service may not be updated accordingly.
  
  Solution:
  
  
  Check Entity Set Definition: Verify that the entity set in the OData service has the correct key fields defined. You can do this by checking the service metadata (usually accessible via the service URL with $metadata).
  
  
  Review the Request: Ensure that the request being sent to the OData service includes all required key fields. For example, if you are trying to retrieve a specific record, the URL should include the key values in the format: /EntitySet(Key1='value1', Key2='value2').
  
  
  Update OData Service: If there have been changes to the underlying data model, ensure that the OData service is regenerated or updated to reflect those changes. This may involve re-defining the service or re-activating it in the SAP Gateway.
  
  
  Check Service Activation: Ensure that the OData service is properly activated in the SAP Gateway. You can check this in the SAP Gateway Service Builder (transaction code /IWFND/MAINT_SERVICE).
  
  
  Debugging: If the issue persists, consider debugging the OData service to trace where the keys are being processed and identify why they are missing.
  
  
  Related Information:
  
  SAP Gateway: The SAP Gateway is responsible for exposing SAP data and business logic to external applications via OData services.
  OData Protocol: OData is a standard protocol for building and consuming RESTful APIs, and it relies on entity sets and keys to manage data.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on this error message.
  
  If you continue to experience issues after following these steps, it may be helpful to consult with your SAP Basis or development team for further assistance.