How To Fix SD_CDS_ENTITY064 - & is composition entity with multiple root entities (&)

SAP Error Message - Details

• Message type: E = Error

• Message class: SD_CDS_ENTITY - Messages for STOBS/entities

• Message number: 064

• Message text: & is composition entity with multiple root entities (&)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SD_CDS_ENTITY064 - & is composition entity with multiple root entities (&) ?

  The SAP error message SD_CDS_ENTITY064 typically indicates an issue related to the use of Core Data Services (CDS) views in the context of the SAP S/4HANA system, particularly when dealing with composition entities that have multiple root entities. This error can arise when the CDS view is not properly defined or when the underlying data model does not conform to the expected structure.
  Cause:
  
  Multiple Root Entities: The error suggests that the CDS view is defined as a composition entity but has multiple root entities. In a composition entity, there should ideally be a single root entity that serves as the primary data source, while other entities are related to it.
  Incorrect Associations: The associations between the entities may not be correctly defined, leading to ambiguity in the data model.
  Data Model Design: The design of the data model may not align with the expected structure for a composition entity, which can lead to this error.
  
  Solution:
  
  Review the CDS View Definition: Check the definition of the CDS view to ensure that it is correctly defined as a composition entity with a single root entity. Make sure that the associations are properly established.
  Adjust Associations: If there are multiple root entities, consider restructuring the data model to ensure that there is a clear hierarchy and that the composition entity has a single root.
  Use Annotations: Ensure that the appropriate annotations are used in the CDS view to define the relationships and structure correctly.
  Test the CDS View: After making changes, test the CDS view to ensure that it functions as expected without errors.
  Consult Documentation: Refer to the SAP documentation for Core Data Services and composition entities to understand the best practices and guidelines for defining these entities.
  
  Related Information:
  
  Core Data Services (CDS): CDS is a framework for defining and consuming semantically rich data models in SAP systems. It allows for the creation of views that can be used in various applications.
  Composition Entities: In the context of CDS, a composition entity is a type of entity that is composed of other entities. It is important to ensure that the relationships are well-defined to avoid errors.
  SAP Notes and Community: Check SAP Notes for any specific fixes or updates related to this error. The SAP Community forums can also be a valuable resource for finding solutions and discussing similar issues with other users.
  
  If the problem persists after following these steps, it may be beneficial to reach out to SAP support for further assistance.