How To Fix /IWFND/CM_MGW259 - Change the processing mode to "routing-based" before adding system alias

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 259

• Message text: Change the processing mode to "routing-based" before adding system alias

Self-Explanatory Message

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• What is the cause and solution for SAP error message /IWFND/CM_MGW259 - Change the processing mode to "routing-based" before adding system alias ?

  The SAP error message /IWFND/CM_MGW259 indicates that there is an issue with the configuration of the OData service in the SAP Gateway. Specifically, it suggests that the processing mode needs to be changed to "routing-based" before you can add a system alias. Here’s a breakdown of the cause, solution, and related information for this error:
  Cause
  The error occurs when you attempt to add a system alias in the SAP Gateway but the processing mode is set to "service-based" instead of "routing-based." The routing-based processing mode is required for certain configurations, especially when dealing with multiple back-end systems or when you want to route requests to different systems based on the service being called.
  Solution
  To resolve this error, you need to change the processing mode from "service-based" to "routing-based." Here are the steps to do this:
  
  
  Access the SAP Gateway Service Builder:
  
  Go to transaction code /IWFND/MAINT_SERVICE in the SAP GUI.
  
  
  
  Select the Service:
  
  Find and select the OData service for which you are trying to add the system alias.
  
  
  
  Change the Processing Mode:
  
  Look for the option to change the processing mode. This is usually found in the service configuration settings.
  Change the processing mode from "service-based" to "routing-based."
  
  
  
  Save the Changes:
  
  After changing the processing mode, make sure to save your changes.
  
  
  
  Add the System Alias:
  
  Now, you should be able to add the system alias without encountering the error.
  
  
  
  Related Information
  
  
  Understanding Processing Modes:
  
  Service-based Processing: This mode is typically used for simpler scenarios where a single back-end system is involved.
  Routing-based Processing: This mode is used for more complex scenarios where requests need to be routed to different back-end systems based on the service being called.
  
  
  
  Documentation and Help:
  
  Refer to the SAP Help Portal or the SAP Community for more detailed documentation on configuring OData services and understanding the implications of processing modes.
  
  
  
  Testing:
  
  After making the changes, it is advisable to test the OData service to ensure that it is functioning correctly and that the requests are being routed as expected.
  
  
  
  By following these steps, you should be able to resolve the error and successfully configure your OData service in the SAP Gateway.