How To Fix /IWFND/CM_CONSUMER066 - Outbound mapper method: mapReadResult

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_CONSUMER -

• Message number: 066

• Message text: Outbound mapper method: mapReadResult

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_CONSUMER066 - Outbound mapper method: mapReadResult ?

  The SAP error message /IWFND/CM_CONSUMER066 typically occurs in the context of SAP Gateway and OData services. This error is related to the outbound mapping of the response data when the OData service is trying to return data to the consumer (client). The specific message "Outbound mapper method: mapReadResult" indicates that there is an issue during the mapping of the read result from the backend to the OData response.
  Causes:
  
  
  Data Model Issues: There may be inconsistencies or issues in the data model defined in the OData service. This could include missing or incorrectly defined entity types, properties, or associations.
  
  
  Mapping Errors: The mapping logic in the service implementation might be incorrect. This could be due to incorrect data types, missing fields, or logic that does not handle certain cases properly.
  
  
  Service Implementation Issues: If the service implementation (e.g., the method that fetches data) is not correctly implemented or is throwing exceptions, it can lead to this error.
  
  
  Authorization Issues: Sometimes, the error can occur if the user does not have the necessary authorizations to access certain data.
  
  
  Data Retrieval Issues: If the underlying data retrieval logic (e.g., database queries) fails or returns unexpected results, it can lead to mapping errors.
  
  
  Solutions:
  
  
  Check Data Model: Review the data model in the OData service. Ensure that all entity types, properties, and associations are correctly defined and match the backend data structure.
  
  
  Debug the Service Implementation: Use transaction code /IWFND/ERROR_LOG to check for detailed error logs. Debug the service implementation to identify where the mapping is failing. Look for exceptions or errors in the code.
  
  
  Review Mapping Logic: Ensure that the mapping logic in the mapReadResult method is correctly implemented. Check for any assumptions made in the code that may not hold true for all data scenarios.
  
  
  Check Authorizations: Verify that the user has the necessary authorizations to access the data being requested. Use transaction code SU53 to analyze authorization issues.
  
  
  Test with Different Data: If possible, test the OData service with different sets of data to see if the error is data-specific. This can help identify if certain records are causing the issue.
  
  
  Check Backend Data: Ensure that the backend data is consistent and does not contain any anomalies that could lead to mapping issues.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  /IWFND/ERROR_LOG: To view error logs related to OData services.
  /IWFND/MAINT_SERVICE: To maintain and activate OData services.
  SE80: To access the Object Navigator for checking the service implementation.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues with the specific version of SAP Gateway you are using.
  
  
  Documentation: Refer to the SAP Gateway documentation for best practices on implementing OData services and handling errors.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the /IWFND/CM_CONSUMER066 error in your SAP system.