How To Fix /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

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• 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