How To Fix /IWBEP/CM_V4_RUNTIME142 - Target operation return is no complex collection

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_RUNTIME -

• Message number: 142

• Message text: Target operation return is no complex collection

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_RUNTIME142 - Target operation return is no complex collection ?

  The SAP error message /IWBEP/CM_V4_RUNTIME142 Target operation return is no complex collection typically occurs in the context of SAP Gateway and OData services. This error indicates that the expected return type of an OData operation is not a complex collection, which can lead to issues when the service is trying to process the response.
  Cause:
  
  Incorrect Return Type: The OData service is expected to return a complex collection (like an array of objects), but it is returning a different type (like a single object or a primitive type).
  Service Definition Issues: The service definition in the OData model may not be correctly defined to handle the expected return type.
  Implementation Errors: The implementation of the service method may not be returning the correct data structure as defined in the OData metadata.
  
  Solution:
  
  
  Check the OData Service Definition:
  
  Review the service definition in the SAP Gateway Service Builder (transaction code SEGW).
  Ensure that the entity set is defined correctly and that the return type of the operation matches the expected complex collection.
  
  
  
  Review the Implementation:
  
  Check the implementation of the method in the Data Provider Class (DPC) to ensure that it returns the correct data structure.
  If the method is supposed to return a collection, ensure that it is returning a table or an array of complex types.
  
  
  
  Adjust the Return Type:
  
  If the operation is intended to return a single object, adjust the OData service definition to reflect that it is not a collection.
  If it should return a collection, ensure that the implementation correctly constructs and returns a collection of the expected type.
  
  
  
  Test the Service:
  
  After making changes, regenerate the service and test it using the SAP Gateway Client (transaction code /IWFND/GW_CLIENT) or any OData client to ensure that the error is resolved.
  
  
  
  Check Metadata:
  
  Review the OData service metadata (by accessing the service URL with $metadata) to confirm that the entity types and sets are defined as expected.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  OData Documentation: Review the official SAP documentation on OData services and the SAP Gateway to understand the expected data structures and return types.
  Debugging: Use debugging tools in the ABAP environment to trace the execution of the OData service and identify where the return type is being incorrectly set.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.