How To Fix /IWBEP/CM_V4_MED192 - Entity type '&1': unit value property '&2' cannot be key

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 192

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

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED192 - Entity type '&1': unit value property '&2' cannot be key ?

  The SAP error message /IWBEP/CM_V4_MED192 typically occurs in the context of OData services when there is an issue with the entity type definition in the service metadata. The error message indicates that a property defined as a unit value cannot be used as a key property for the entity type.
  Cause:
  
  Unit Value Property: The property in question is defined as a unit value (e.g., a quantity with a unit of measure). In OData, unit value properties are not allowed to be part of the key of an entity type because keys must be simple types (like strings, integers, etc.) that uniquely identify an entity.
  Model Definition: The entity type definition in the data model may incorrectly specify a unit value property as a key.
  
  Solution:
  
  Review Entity Type Definition: Check the definition of the entity type in the data model (e.g., in the ABAP Dictionary or the OData service definition). Ensure that the key properties are simple types and do not include unit value properties.
  Modify Key Properties: If a unit value property is mistakenly included in the key, remove it from the key definition. Instead, use other properties that uniquely identify the entity.
  Regenerate the OData Service: After making changes to the entity type definition, regenerate the OData service to ensure that the changes are reflected in the service metadata.
  Test the Service: After making the necessary adjustments, test the OData service to ensure that the error is resolved and that the service behaves as expected.
  
  Related Information:
  
  OData Services: OData (Open Data Protocol) is a standard protocol for building and consuming RESTful APIs. In SAP, OData services are often used to expose business data.
  Entity Types and Keys: In OData, each entity type must have a key that uniquely identifies its instances. The key properties must be of simple types and cannot include complex types like unit values.
  SAP Documentation: For more detailed information, refer to the SAP Help Portal or the specific documentation related to OData services and entity type definitions.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service is correctly configured.