How To Fix /IWBEP/SBOD021 - '&1' is not an entity set of the principal entity of association '&2'

/IWBEP/SBOD021 - Overview

• Message type: E = Error

• Message class: /IWBEP/SBOD -

• Message number: 021

• Message text: '&1' is not an entity set of the principal entity of association '&2'

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.

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/IWBEP/SBOD021 - Details

• The SAP error message /IWBEP/SBOD021 '&1' is not an entity set of the principal entity of association '&2' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is an issue with the way entity sets and associations are defined in your OData service.
  
  Cause:
  
  
  Incorrect Association Definition: The association defined in your OData model may not correctly reference the entity set. This can happen if the entity set is not properly defined or if there is a mismatch in the names.
  
  
  Entity Set Not Included: The entity set that is being referenced in the association may not be included in the service or may not be correctly exposed.
  
  
  Model 
  Configuration Issues: There may be issues in the metadata configuration of the OData service, such as missing or incorrect definitions in the service's data model.
  
  
  Service Activation Issues: The OData service may not be activated properly, or there may