How To Fix /FTI/INTERNAL_ERROR028 - Error in generation of MPC EXT class

SAP Error Message - Details

• Message type: E = Error

• Message class: /FTI/INTERNAL_ERROR -

• Message number: 028

• Message text: Error in generation of MPC EXT class

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /FTI/INTERNAL_ERROR028 - Error in generation of MPC EXT class ?

  The SAP error message /FTI/INTERNAL_ERROR028 Error in generation of MPC EXT class typically occurs in the context of SAP Fiori and OData services, particularly when there is an issue with the generation of the Model Provider Class (MPC) extension. This error can arise due to various reasons, including issues with the underlying data model, inconsistencies in the service definition, or problems with the development environment.
  Causes:
  
  Model Definition Issues: There may be inconsistencies or errors in the data model definition, such as missing or incorrectly defined entities, associations, or properties.
  Service Registration Problems: The OData service may not be properly registered or activated in the SAP Gateway.
  Code Generation Errors: There could be issues during the code generation process, such as syntax errors or missing dependencies in the ABAP code.
  Transport Issues: If the changes were transported from one system to another, there might be inconsistencies in the transport request.
  Development Environment Issues: Problems with the development environment, such as missing authorizations or incorrect settings in the SAP system.
  
  Solutions:
  
  Check Model Definition: Review the data model in the SAP Gateway Service Builder (transaction code SEGW) to ensure that all entities, properties, and associations are correctly defined.
  Rebuild the Service: Try to regenerate the service by right-clicking on the service in the Service Builder and selecting "Regenerate" or "Rebuild".
  Check for Syntax Errors: If you have made custom changes to the MPC or DPC classes, check for any syntax errors or inconsistencies in the ABAP code.
  Activate the Service: Ensure that the OData service is activated in the SAP Gateway (transaction code /IWFND/MAINT_SERVICE).
  Check Transport Requests: If the issue arose after a transport, check the transport logs for any errors and ensure that all necessary objects were included in the transport.
  Review Authorizations: Ensure that you have the necessary authorizations to perform the operations related to the OData service.
  Check SAP Notes: Look for any relevant SAP Notes that might address this specific error or provide patches or updates.
  
  Related Information:
  
  Transaction Codes: 
  
  SEGW: Service Builder for OData services.
  /IWFND/MAINT_SERVICE: Maintenance of OData services.
  SE80: Object Navigator for ABAP development.
  
  
  SAP Notes: Search the SAP Support Portal for notes related to /FTI/INTERNAL_ERROR028 or similar issues.
  Documentation: Review the SAP Gateway documentation for best practices in service development and troubleshooting.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the steps you have already taken.