How To Fix /STTPEC/ODATA023 - Function return type '&1' not supported

/STTPEC/ODATA023 - Overview

• Message type: E = Error

• Message class: /STTPEC/ODATA -

• Message number: 023

• Message text: Function return type '&1' not supported

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /STTPEC/ODATA023 - Function return type '&1' not supported ?

  The SAP error message /STTPEC/ODATA023 Function return type '&1' not supported typically occurs in the context of OData services when the return type of a function or operation is not recognized or supported by the OData framework in SAP. This can happen for various reasons, including incorrect data types, unsupported return types, or issues with the service definition.
  Causes:
  
  Unsupported Return Type: The function or operation is defined to return a data type that is not supported by the OData service. For example, complex types or certain custom types may not be recognized.
  Incorrect Metadata: The metadata of the OData service may not be correctly defined, leading to mismatches between expected and actual return types.
  
  Configuration Issues: There may be configuration issues in the OData service or the underlying data model that prevent the correct return type from being recognized.
  Version Compatibility: The version of the OData service or the SAP system may not support