How To Fix /IWBEP/CM_MGW_RT175 - Key structure for entity type &1 not created; check service model

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 175

• Message text: Key structure for entity type &1 not created; check service model

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_RT175 - Key structure for entity type &1 not created; check service model ?

  The SAP error message /IWBEP/CM_MGW_RT175 indicates that there is an issue with the key structure for an entity type in your OData service model. This error typically arises when the key fields for an entity type are not properly defined or configured in the service model.
  Cause:
  
  Missing Key Fields: The entity type defined in the service model does not have any key fields specified. Every entity type in OData must have a key to uniquely identify its instances.
  Incorrect Configuration: The service model may not be correctly configured, leading to the inability to generate the key structure.
  Model Inconsistencies: There may be inconsistencies in the data model, such as missing associations or navigation properties that are required for the key structure.
  Service Activation Issues: The OData service may not be activated properly, or there may be issues with the service definition.
  
  Solution:
  
  
  Define Key Fields:
  
  Go to the service model in the SAP Gateway Service Builder (transaction code SEGW).
  Open the entity type that is causing the error.
  Ensure that at least one key field is defined. You can do this by right-clicking on the entity type and selecting "Add Key" to specify the key properties.
  
  
  
  Check Service Model Configuration:
  
  Review the entire service model to ensure that all entity types and their relationships are correctly defined.
  Make sure that all necessary associations and navigation properties are in place.
  
  
  
  Re-generate the Runtime Artifacts:
  
  After making changes to the entity type, regenerate the runtime artifacts by right-clicking on the project and selecting "Generate Runtime Objects".
  
  
  
  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.
  
  
  
  Test the Service:
  
  After making the necessary changes and activating the service, test the OData service using the SAP Gateway Client (transaction code /IWFND/GW_CLIENT) to ensure that the error is resolved.
  
  
  
  Related Information:
  
  SAP Gateway: The SAP Gateway is a technology that allows you to connect devices, environments, and platforms to SAP systems. It enables the creation of OData services.
  OData Services: OData (Open Data Protocol) is a standard protocol for building and consuming RESTful APIs. In SAP, OData services are used to expose business data and operations.
  Entity Types and Keys: In OData, an entity type represents a data structure, and keys are used to uniquely identify instances of that entity type.
  
  If the issue persists after following these steps, you may need to check the SAP notes or consult with your SAP Basis or development team for further troubleshooting.