How To Fix /IWBEP/CM_V4_MED161 - Service reference '&1' not found for navigation property '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 161

• Message text: Service reference '&1' not found for navigation property '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED161 - Service reference '&1' not found for navigation property '&2' ?

  The SAP error message /IWBEP/CM_V4_MED161 indicates that there is an issue with a service reference in an OData service. Specifically, it means that the service reference for a navigation property is not found. This can occur in various scenarios when working with SAP Gateway and OData services.
  Cause:
  
  Missing Service Reference: The service reference specified in the error message does not exist in the OData service definition.
  Incorrect Navigation Property: The navigation property specified may not be correctly defined in the data model or may not exist.
  Service Activation Issues: The OData service may not be properly activated or registered in the SAP Gateway.
  Model Changes: If there have been recent changes to the data model (like adding or removing entities or navigation properties), the service might not reflect those changes.
  Authorization Issues: The user may not have the necessary authorizations to access the navigation property.
  
  Solution:
  
  
  Check Service Definition:
  
  Go to the SAP Gateway Service Builder (transaction code SEGW) and check the service definition for the navigation property and service reference.
  Ensure that the navigation property is correctly defined and that the service reference exists.
  
  
  
  Activate the Service:
  
  Ensure that the OData service is activated in the SAP Gateway. You can do this using transaction code /IWFND/MAINT_SERVICE.
  Check if the service is listed and activated. If not, activate it.
  
  
  
  Regenerate the Service:
  
  If there have been changes to the data model, regenerate the service by right-clicking on the service in the Service Builder and selecting "Generate Runtime Objects".
  
  
  
  Check for Authorization:
  
  Verify that the user has the necessary authorizations to access the OData service and the specific navigation property.
  
  
  
  Debugging:
  
  Use transaction IWFND/ERROR_LOG to check for any additional error messages that might provide more context.
  You can also use transaction IWFND/TRACE to trace the OData service calls and see where the error occurs.
  
  
  
  Check Metadata:
  
  Access the service metadata (usually at the URL http://<host>:<port>/sap/opu/odata/sap/<service_name>/$metadata) to ensure that the navigation property is correctly defined in the metadata.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address known issues related to this error message.
  Documentation: Review the SAP Gateway and OData documentation for best practices in defining and managing OData services.
  Community Forums: Consider searching or posting in SAP Community forums for additional insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the issue related to the error message /IWBEP/CM_V4_MED161.