How To Fix SDDIC_DDLA_ANNOCHECK020 - Annotation '&1' is a structured type and a scalar value was found

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDIC_DDLA_ANNOCHECK - Messages for annotation usage check

• Message number: 020

• Message text: Annotation '&1' is a structured type and a scalar value was found

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDIC_DDLA_ANNOCHECK020 - Annotation '&1' is a structured type and a scalar value was found ?

  The SAP error message SDDIC_DDLA_ANNOCHECK020 indicates that there is a mismatch in the data type of an annotation in your SAP system. Specifically, the error states that an annotation (denoted by &1) is expected to be a structured type, but a scalar value was found instead. This typically occurs in the context of OData services or when working with annotations in the SAP Gateway or SAP Fiori applications.
  Cause:
  
  Type Mismatch: The annotation defined in your metadata is expected to be a structured type (like a complex object with multiple fields), but the actual value provided is a scalar (like a single string, number, etc.).
  Incorrect Annotation Definition: The annotation might be incorrectly defined in the data model or in the service definition.
  Model Changes: If there have been recent changes to the data model or service definitions, it could lead to inconsistencies between the expected and actual data types.
  
  Solution:
  
  Check Annotation Definition: Review the annotation definition in your OData service or data model. Ensure that the annotation is defined as a structured type if that is what is expected.
  Correct the Value: If you are providing a value for the annotation, ensure that it matches the expected structured type. You may need to provide a complete object instead of a single value.
  Update Metadata: If there have been changes to the underlying data model, ensure that the metadata is updated accordingly. You may need to regenerate the service or refresh the metadata.
  Debugging: Use transaction codes like /IWFND/ERROR_LOG to check for additional error details or logs that can provide more context on where the issue is occurring.
  Consult Documentation: Refer to the SAP documentation for the specific annotations you are using to ensure that you are following the correct structure and data types.
  
  Related Information:
  
  OData Services: Understanding how OData services work in SAP can help in diagnosing issues related to annotations and data types.
  SAP Gateway: Familiarize yourself with the SAP Gateway framework, as it is often involved in the creation and consumption of OData services.
  Data Model: Review the data model definitions in your SAP system to ensure that they align with the expected structures for annotations.
  
  If the issue persists after checking these areas, consider reaching out to SAP support or consulting with a developer who has experience with SAP OData services and annotations.