How To Fix /IWBEP/CM_MGW_RT124 - Property '&1' not found on principal '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 124

• Message text: Property '&1' not found on principal '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_RT124 - Property '&1' not found on principal '&2' ?

  The SAP error message /IWBEP/CM_MGW_RT124 Property '&1' not found on principal '&2' typically occurs in the context of SAP Gateway and OData services. This error indicates that the system is trying to access a property (field) that does not exist on the specified entity (principal) in the OData model.
  Cause:
  
  Missing Property: The property specified in the error message (&1) is not defined in the entity type (&2) of the OData service.
  Model Mismatch: There may be a mismatch between the OData service metadata and the underlying data model in the backend system.
  Service Activation: The OData service may not be properly activated or may not have been updated after changes were made to the underlying data model.
  Incorrect Mapping: There could be incorrect mapping in the service definition or in the data provider class.
  
  Solution:
  
  
  Check Entity Definition: Verify that the property (&1) is defined in the entity type (&2) in the OData service's metadata. You can do this by checking the service's metadata document (usually accessible via the service URL with $metadata).
  
  
  Update Service: If the property was recently added to the data model, ensure that the OData service is updated. You can do this by:
  
  Regenerating the service.
  Activating the service in the SAP Gateway Service Builder (transaction code /IWFND/MAINT_SERVICE).
  
  
  
  Check Data Provider Class: If you are using a custom data provider class, ensure that the property is correctly implemented in the class. Check the methods that handle the data retrieval and ensure they include the property in question.
  
  
  Clear Cache: Sometimes, the issue can be related to caching. Clear the cache of the OData service using transaction code /IWFND/CACHE and then test the service again.
  
  
  Debugging: If the issue persists, consider debugging the OData service to trace where the property is being accessed and why it is not found.
  
  
  Check for Typos: Ensure that there are no typos in the property name or entity name in the service implementation.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  /IWFND/MAINT_SERVICE: To maintain and activate OData services.
  /IWFND/CACHE: To clear the cache for OData services.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that might address known issues related to this error message.
  
  
  Documentation: Refer to the SAP Gateway documentation for more details on OData service development and troubleshooting.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the error message /IWBEP/CM_MGW_RT124.