How To Fix EIT_REGISTRY026 - Handler class &1 can only be mapped to exactly one Open API Service.

SAP Error Message - Details

• Message type: E = Error

• Message class: EIT_REGISTRY - Extension Item Template: Messages for Registry Check

• Message number: 026

• Message text: Handler class &1 can only be mapped to exactly one Open API Service.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message EIT_REGISTRY026 - Handler class &1 can only be mapped to exactly one Open API Service. ?

  The SAP error message EIT_REGISTRY026 indicates that there is an issue with the mapping of a handler class to an Open API service. Specifically, it means that the system has detected that the handler class specified is being mapped to more than one Open API service, which is not allowed.
  Cause:
  
  Duplicate Mapping: The handler class is likely defined in multiple Open API services, leading to a conflict.
  Configuration Error: There may be a misconfiguration in the service definitions or the handler class assignments.
  Development Error: During the development of the Open API services, the same handler class might have been unintentionally assigned to multiple services.
  
  Solution:
  
  
  Check Handler Class Assignments:
  
  Review the Open API service definitions in your SAP system.
  Ensure that each handler class is assigned to only one Open API service.
  
  
  
  Modify Service Definitions:
  
  If a handler class is indeed required for multiple services, consider creating separate handler classes for each service or refactoring the existing handler class to accommodate the needs of multiple services without causing conflicts.
  
  
  
  Use Transaction Codes:
  
  Use transaction codes like /IWFND/MAINT_SERVICE to manage and check the service registrations.
  Use /IWFND/ERROR_LOG to check for any additional error messages that might provide more context.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for Open API services and handler classes to ensure that you are following best practices for service design and implementation.
  
  
  
  Testing:
  
  After making changes, test the Open API services to ensure that they are functioning correctly and that the error message no longer appears.
  
  
  
  Related Information:
  
  Open API Services: These are services that expose APIs for external consumption, and they require careful management of handler classes to ensure that they function correctly.
  Handler Classes: These are classes that contain the logic for processing requests and responses for the Open API services.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on handling Open API services.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the steps you have already taken.