How To Fix /IWBEP/CM_V4_RUNTIME144 - Target operation return is no entity collection

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_RUNTIME -

• Message number: 144

• Message text: Target operation return is no entity collection

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_RUNTIME144 - Target operation return is no entity collection ?

  The SAP error message /IWBEP/CM_V4_RUNTIME144 Target operation return is no entity collection typically occurs in the context of SAP Gateway and OData services. This error indicates that the expected response from an OData service operation does not return a collection of entities as anticipated. Instead, it may return a single entity or no entity at all.
  Causes:
  
  Incorrect OData Service Implementation: The OData service might be incorrectly implemented, leading to a mismatch between the expected response type and the actual response.
  Service Metadata Issues: The service metadata might not be correctly defined, causing the client to expect a collection when the service is returning a single entity or no entity.
  Query Parameters: The request might be incorrectly formed, such as using a query that expects a collection but the underlying data does not support it.
  Data Availability: There may be no data available for the requested operation, leading to an empty response.
  Service Configuration: The service might not be properly configured to handle the request as expected.
  
  Solutions:
  
  Check OData Service Implementation: Review the implementation of the OData service to ensure that it correctly returns a collection when expected. This includes checking the methods in the service that handle the requests.
  Review Service Metadata: Ensure that the service metadata (e.g., the $metadata endpoint) correctly defines the entity sets and their relationships. Make sure that the expected entity collection is defined.
  Validate Request Parameters: Check the request being sent to the OData service. Ensure that the query parameters are correct and that they align with the expected input for the operation.
  Data Verification: Verify that there is data available in the backend that matches the request criteria. If the data is not present, the service may return an empty response.
  Service Configuration: Review the configuration of the OData service in the SAP Gateway. Ensure that the service is activated and properly configured to handle the requests.
  Debugging: Use debugging tools in SAP (like transaction /IWFND/ERROR_LOG) to get more details about the error and trace the execution flow to identify where the issue occurs.
  
  Related Information:
  
  SAP Gateway: Familiarize yourself with the SAP Gateway framework and how it handles OData services.
  OData Protocol: Understanding the OData protocol can help in diagnosing issues related to entity collections and service responses.
  SAP Notes: Check for any relevant SAP Notes or documentation that may address known issues or provide guidance on similar error messages.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.