How To Fix /IWBEP/SBDSP_DM013 - Key property &1 must have an output mapping

/IWBEP/SBDSP_DM013 - Overview

• Message type: E = Error

• Message class: /IWBEP/SBDSP_DM -

• Message number: 013

• Message text: Key property &1 must have an output mapping

Self-Explanatory Message

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/IWBEP/SBDSP_DM013 - Details

• The SAP error message /IWBEP/SBDSP_DM013 indicates that a key property in your OData service does not have an output mapping defined. This typically occurs when you are working with the SAP Gateway and trying to expose a data model as an OData service.
  
  Cause:
  The error is caused by the absence of an output mapping for a key property in the data model. In OData services, key properties are essential for uniquely identifying entities. If the system cannot find a mapping for these properties, it raises this error.
  
  Solution:
  To resolve this error, you need to ensure that all key properties in your data model have corresponding output mappings. Here are the steps to do this:
  
  
  Open the Data Model: Go to the relevant data model in the SAP Gateway Service Builder (transaction code SEGW).
  
  
  Check Key Properties: Identify the entity type that is causing the issue. Look for the key properties defined in that entity.
  
  
  Define