How To Fix CL_SADL_GW_MDE_MSG029 - Property & is not allowed in CDS or was already used

CL_SADL_GW_MDE_MSG029 - Overview

• Message type: E = Error

• Message class: CL_SADL_GW_MDE_MSG -

• Message number: 029

• Message text: Property & is not allowed in CDS or was already used

Self-Explanatory Message

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CL_SADL_GW_MDE_MSG029 - Details

• The SAP error message CL_SADL_GW_MDE_MSG029 typically occurs when there is an issue with the definition of a Core Data Services (CDS) view, particularly when it comes to the use of properties in the context of the SAP Gateway and the SADL (Service Adaptation Definition Language) framework.
  
  Cause:
  This error message indicates that a property (or field) is either:
  
  Not allowed in the context of the CDS view you are trying to create or modify.
  Already used in a way that conflicts with the current definition or usage in the CDS view.
  
  Common causes include:
  
  Using a property that is not defined in the underlying data model.
  Attempting to use a property that is already defined in the CDS view but is being referenced again in a conflicting manner.
  Misconfiguration in the annotations or the structure of the CDS view.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Property Definitions: Review the properties defined in your CDS view.