How To Fix /IWBEP/CM_V4_MED191 - Entity type '&1': currency value property '&2' cannot be key

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 191

• Message text: Entity type '&1': currency value property '&2' cannot be key

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED191 - Entity type '&1': currency value property '&2' cannot be key ?

  The SAP error message /IWBEP/CM_V4_MED191 indicates that there is an issue with the definition of an entity type in an OData service. Specifically, the error states that a currency value property cannot be used as a key for the entity type. 
  Cause:
  
  
  Currency Value Properties: In OData, currency value properties are typically represented as a combination of a numeric value and a currency code. These properties are not suitable to be used as keys because keys should uniquely identify an entity, and currency values can change (e.g., due to exchange rate fluctuations).
  
  
  Model Definition: The error may arise from the way the entity type is defined in the data model. If a currency value property is mistakenly marked as a key in the metadata, this will trigger the error.
  
  
  Solution:
  
  
  Review Entity Type Definition: Check the definition of the entity type in the OData service. Ensure that the currency value property is not included in the key properties of the entity.
  
  
  Modify the Metadata: If you have access to the OData service's metadata, you will need to modify it to remove the currency property from the key definition. This can typically be done in the ABAP code or the service definition in the SAP Gateway.
  
  
  Use Appropriate Key Properties: Ensure that the key properties for the entity type are appropriate and uniquely identify the entity. Common key properties include IDs or other unique identifiers that do not change.
  
  
  Regenerate the Service: After making changes to the entity type definition, regenerate the OData service to ensure that the changes take effect.
  
  
  Test the Service: After making the necessary changes, test the OData service to confirm that the error has been resolved and that the service behaves as expected.
  
  
  Related Information:
  
  OData Standards: Familiarize yourself with OData standards and best practices regarding entity definitions and key properties.
  SAP Gateway: If you are working with SAP Gateway, refer to the documentation for guidance on defining entity types and properties.
  Debugging Tools: Use debugging tools available in SAP to trace the issue and understand how the entity type is being processed.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service is correctly defined.