How To Fix CL_RAP_OPXY_EDMX_MSG004 - Multiple Schema Namespaces not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: CL_RAP_OPXY_EDMX_MSG -

• Message number: 004

• Message text: Multiple Schema Namespaces not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CL_RAP_OPXY_EDMX_MSG004 - Multiple Schema Namespaces not supported ?

  The SAP error message CL_RAP_OPXY_EDMX_MSG004 indicates that there are multiple schema namespaces defined in the OData service metadata, which is not supported in the context of the RAP (Rapid Application Programming) model. This typically occurs when the service is trying to expose multiple data models or entities that belong to different namespaces, leading to conflicts.
  Cause:
  
  Multiple Namespaces: The OData service is trying to expose entities from different namespaces, which is not allowed in the RAP model.
  Incorrect Configuration: The service might be incorrectly configured to include multiple namespaces in its metadata.
  Model Definition Issues: There may be issues in the way the data model is defined, leading to the generation of multiple namespaces.
  
  Solution:
  
  
  Check the Service Definition: Review the service definition in the SAP system to ensure that it is only using a single namespace. You can do this by checking the service's metadata and ensuring that all entities are defined under the same namespace.
  
  
  Adjust the Data Model: If you have control over the data model, consider consolidating the entities into a single namespace. This may involve modifying the definitions of the entities or the way they are grouped in the service.
  
  
  Regenerate the Service: If changes are made to the data model or service definition, regenerate the OData service to ensure that the metadata reflects the changes.
  
  
  Consult Documentation: Refer to the SAP documentation for RAP and OData services to ensure that you are following best practices for defining and exposing your data models.
  
  
  Check for Updates: Ensure that your SAP system is up to date, as newer versions may have improvements or fixes related to this issue.
  
  
  Related Information:
  
  RAP Model: The RAP model is designed to simplify the development of business applications in SAP, focusing on the use of OData services and the Fiori user experience.
  OData Services: OData (Open Data Protocol) is a standard protocol for building and consuming RESTful APIs. In SAP, OData services are often used to expose business data to applications.
  Namespaces in OData: In OData, a namespace is a way to group related entities and avoid naming conflicts. Each entity set should ideally belong to a single namespace to ensure clarity and avoid errors.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting with a technical expert familiar with the RAP model and OData services.