How To Fix SDDIC_DDLA_ANNOCHECK207 - Nested array annotations are not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDIC_DDLA_ANNOCHECK - Messages for annotation usage check

• Message number: 207

• Message text: Nested array annotations are 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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDDIC_DDLA_ANNOCHECK207 - Nested array annotations are not supported ?

  The SAP error message SDDIC_DDLA_ANNOCHECK207 indicates that there is an issue with nested array annotations in your data model or service definition. This error typically arises when you are trying to define a data structure that includes arrays of arrays, which is not supported in the context of the annotations being used.
  Cause:
  The primary cause of this error is the attempt to use nested arrays in your OData service or data model. In OData, the specification does not support arrays of arrays (i.e., an array containing other arrays). This limitation is often encountered when defining complex data structures in SAP Gateway or when using annotations in CDS (Core Data Services) views.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Flatten the Structure: Instead of using nested arrays, try to flatten your data structure. This means you should represent the data in a single array or use a different approach to model the relationships. For example, if you have a parent-child relationship, you can represent the child entities as a separate entity set and link them using a foreign key.
  
  
  Use Complex Types: If you need to represent complex data, consider using complex types instead of nested arrays. Complex types allow you to define structured data without nesting arrays.
  
  
  Review Annotations: Check the annotations you are using in your CDS views or service definitions. Ensure that they are correctly defined and do not imply nested arrays.
  
  
  Refactor the Data Model: If the data model is inherently complex, you may need to refactor it to comply with OData standards. This could involve creating additional entities or views to represent the data without nesting.
  
  
  Consult Documentation: Refer to the SAP documentation for OData and CDS to understand the limitations and best practices for defining data structures.
  
  
  Related Information:
  
  OData Specification: Familiarize yourself with the OData specification, particularly regarding data types and structures.
  SAP Gateway: If you are using SAP Gateway, review the documentation on how to define entity types and sets properly.
  CDS Views: If you are using CDS views, check the SAP Help Portal for guidelines on defining annotations and data structures.
  
  By following these steps, you should be able to resolve the error and create a compliant data model that does not use nested arrays.