How To Fix SLMP_RT259 - Entity set &1 contains wrong entity (Exp: &2 Act: &3)

SAP Error Message - Details

• Message type: E = Error

• Message class: SLMP_RT - SL Protocol Runtime Message Class

• Message number: 259

• Message text: Entity set &1 contains wrong entity (Exp: &2 Act: &3)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SLMP_RT259 - Entity set &1 contains wrong entity (Exp: &2 Act: &3) ?

  The SAP error message SLMP_RT259 indicates that there is a mismatch between the expected and actual entities in a specific entity set. This error typically arises in the context of SAP applications that utilize the SAP Gateway or OData services, where entity sets are defined for data operations.
  Cause:
  The error message SLMP_RT259 can occur due to several reasons:
  
  Data Inconsistency: The entity set may contain data that does not conform to the expected structure or type. For example, if the entity set is expected to contain a certain type of entity but instead contains a different type.
  Configuration Issues: There may be a misconfiguration in the OData service or the underlying data model that leads to the wrong entity being referenced.
  Incorrect Mapping: The mapping between the entity set and the underlying database tables or structures may be incorrect, leading to the retrieval of unexpected entities.
  Versioning Issues: If there are multiple versions of the service or changes in the data model, the client may be trying to access an outdated or incompatible version of the entity set.
  
  Solution:
  To resolve the SLMP_RT259 error, you can take the following steps:
  
  
  Check Entity Set Definition: Verify the definition of the entity set in the OData service. Ensure that it is correctly defined and that the expected entity types are properly configured.
  
  
  Review Data: Inspect the data in the entity set to ensure that it matches the expected structure. Look for any anomalies or incorrect entries that may be causing the mismatch.
  
  
  Update Service: If there have been recent changes to the data model or entity definitions, ensure that the OData service is updated and reactivated. You can do this using transaction code /IWFND/MAINT_SERVICE to maintain and activate the service.
  
  
  Check for Versioning Issues: If you are using different versions of the service, ensure that the client is accessing the correct version that matches the expected entity set.
  
  
  Debugging: If the issue persists, consider debugging the OData service to trace the execution flow and identify where the mismatch occurs. This may involve checking the backend logic that retrieves the data for the entity set.
  
  
  Consult Documentation: Review the SAP documentation related to the specific OData service and entity sets to ensure compliance with best practices and guidelines.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the SLMP_RT259 error. SAP frequently updates its knowledge base with solutions for common errors.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /IWFND/MAINT_SERVICE for managing OData services and /IWFND/ERROR_LOG for checking error logs related to OData services.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the SLMP_RT259 error in your SAP environment.