How To Fix /IWBEP/CM_V4_MED110 - NP bind. (ES '&1'): Nav-prop '&2' not found in complex type '&3'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 110

• Message text: NP bind. (ES '&1'): Nav-prop '&2' not found in complex type '&3'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED110 - NP bind. (ES '&1'): Nav-prop '&2' not found in complex type '&3' ?

  The SAP error message /IWBEP/CM_V4_MED110 NP bind. (ES '&1'): Nav-prop '&2' not found in complex type '&3' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is an issue with navigation properties in the OData model, specifically that a navigation property (&2) is not found in the specified complex type (&3).
  Cause:
  
  Incorrect Navigation Property Name: The navigation property name specified in the OData service might be misspelled or does not exist in the defined entity type.
  Model Definition Issues: The OData model might not be correctly defined, leading to discrepancies between the service definition and the actual data model.
  Changes in Data Model: If there have been recent changes to the underlying data model (like adding or removing fields), the OData service might not be updated accordingly.
  Service Registration Issues: The OData service might not be properly registered or activated in the SAP Gateway.
  
  Solution:
  
  Check Navigation Property Name: Verify that the navigation property name used in the OData request matches exactly with the name defined in the OData model.
  Review OData Model: Inspect the OData service definition in the SAP Gateway Service Builder (transaction code SEGW) to ensure that the navigation properties are correctly defined and mapped to the corresponding entity types.
  Update Service: If there have been changes to the underlying data model, regenerate the OData service by right-clicking on the service in the Service Builder and selecting "Generate Runtime Objects."
  Activate Service: Ensure that the OData service is activated in the SAP Gateway (transaction code /IWFND/MAINT_SERVICE). Check if the service is listed and active.
  Check Metadata: Use the OData service's metadata URL (e.g., http://<host>:<port>/sap/opu/odata/sap/<service_name>/$metadata) to review the structure of the service and confirm that the navigation properties are correctly defined.
  Debugging: If the issue persists, consider debugging the OData service to trace where the navigation property is being referenced and why it is not found.
  
  Related Information:
  
  SAP Gateway Documentation: Refer to the official SAP documentation for OData services and SAP Gateway for detailed guidance on defining and managing OData services.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SEGW (Service Builder), /IWFND/MAINT_SERVICE (Service Maintenance), and /IWBEP/REG_SERVICE (Service Registration).
  Community Forums: Check SAP Community forums or SAP Notes for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the issue related to the navigation property not being found in the complex type.