/IWBEP/SBOD138 - Function Import '&1': Key of type Edm.Date*/Edm.Guid not allowed for 0..1

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/SBOD -

• Message number: 138

• Message text: Function Import '&1': Key of type Edm.Date*/Edm.Guid not allowed for 0..1

Self-Explanatory Message

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AnswerBot

• What is the cause and solution for SAP error message /IWBEP/SBOD138 - Function Import '&1': Key of type Edm.Date*/Edm.Guid not allowed for 0..1 ?

  The SAP error message /IWBEP/SBOD138 Function Import '&1': Key of type Edm.Date*/Edm.Guid not allowed for 0..1 typically occurs in the context of OData services when there is an issue with the definition of a function import in the service's metadata. This error indicates that the function import is trying to use a key of type Edm.Date or Edm.Guid in a context where it is not allowed, specifically for a return type that is defined as 0..1 (which means it can return either zero or one instance).
  Cause:
  
  Function Import Definition: The function import is defined to return a single entity or a collection, but the key parameters used in the function import are of types that are not allowed for the specified cardinality.
  OData Service Metadata: The metadata of the OData service may not be correctly defined, leading to the use of unsupported key types for the function import.
  Model Configuration: There may be a mismatch in the data model configuration, where the expected key types do not align with the actual implementation.
  
  Solution:
  
  
  Check Function Import Definition: Review the definition of the function import in the OData service. Ensure that the parameters used as keys are of types that are allowed for the specified cardinality. If the function is expected to return a single instance, consider using a different key type or adjusting the cardinality.
  
  
  Adjust Key Types: If the function import is using Edm.Date or Edm.Guid as keys, consider changing these to a type that is allowed for the cardinality you are working with, such as Edm.String or Edm.Int32, if applicable.
  
  
  Update Metadata: If changes are made to the function import or its parameters, ensure that the OData service metadata is updated accordingly. This may involve regenerating the service or updating the model.
  
  
  Consult Documentation: Refer to the SAP documentation for OData services to understand the constraints and requirements for function imports, especially regarding key types and cardinality.
  
  
  Testing: After making changes, test the function import to ensure that it behaves as expected and that the error no longer occurs.
  
  
  Related Information:
  
  OData Version: Ensure that you are aware of the OData version being used, as different versions may have different rules regarding key types and cardinality.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on best practices for defining function imports.
  Community Forums: Consider reaching out to SAP community forums or support channels for additional insights or similar experiences from other users.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service functions correctly.