How To Fix CFD_REGISTRY_CHECK023 - Extension Include View &1 must select from exactly one data source

SAP Error Message - Details

• Message type: E = Error

• Message class: CFD_REGISTRY_CHECK - Custom Fields: Messages for Registry Check

• Message number: 023

• Message text: Extension Include View &1 must select from exactly one data source

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CFD_REGISTRY_CHECK023 - Extension Include View &1 must select from exactly one data source ?

  The SAP error message CFD_REGISTRY_CHECK023, which states "Extension Include View &1 must select from exactly one data source," typically occurs in the context of SAP's Core Data Services (CDS) views or when working with extension include views in the ABAP environment. This error indicates that the specified view is attempting to select data from multiple sources, which is not allowed for extension include views.
  
  Cause:
  
  Multiple Data Sources: The extension include view is defined to select from more than one data source (e.g., multiple tables or views), which violates the requirement that it must select from exactly one data source.
  Incorrect View Definition: The view might be incorrectly defined in the ABAP Dictionary or in the CDS view definition, leading to ambiguity in the data source selection.
  Inconsistent Data Model: The underlying data model may not be properly aligned, causing the extension include view to inadvertently reference multiple sources.
  
  
  Solution:
  
  
  Review the View Definition: Check the