How To Fix /IWFND/MED_CHECK018 - No reference for source node '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/MED_CHECK -

• Message number: 018

• Message text: No reference for source node '&1'

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/MED_CHECK018 - No reference for source node '&1' ?

  The SAP error message /IWFND/MED_CHECK018 No reference for source node '&1' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a problem with the mapping or configuration of the source node in your OData service. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Missing Reference: The error suggests that the OData service is trying to access a source node that does not have a defined reference in the data model. This could be due to a misconfiguration in the service definition or the underlying data model.
  Incorrect Mapping: The source node may not be correctly mapped to the corresponding entity or structure in the backend system.
  Service Activation Issues: The OData service may not be properly activated or there may be issues with the service registration.
  Data Model Changes: If there have been recent changes to the data model (like adding or removing fields or entities), the OData service may not reflect these changes.
  
  Solutions:
  
  
  Check Service Definition:
  
  Go to the SAP Gateway Service Builder (transaction code SEGW).
  Open the relevant service and check the entity types and their mappings.
  Ensure that the source node referenced in the error message is correctly defined and mapped.
  
  
  
  Activate/Regenerate the Service:
  
  If you have made changes to the service, ensure that you activate the service again.
  Use transaction code IWFND/MAINT_SERVICE to check if the service is active and properly registered.
  
  
  
  Review Data Model:
  
  Check the underlying data model in the backend (e.g., database tables, structures) to ensure that the source node exists and is correctly defined.
  If there are changes in the data model, regenerate the OData service to reflect those changes.
  
  
  
  Debugging:
  
  Use transaction SE80 or SEGW to debug the service and check the runtime behavior.
  Look for any inconsistencies in the data retrieval logic that might lead to this error.
  
  
  
  Check for Authorization Issues:
  
  Ensure that the user has the necessary authorizations to access the data related to the source node.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message. You can search for the error message or related keywords in the SAP Support Portal.
  OData Documentation: Review the SAP OData documentation for best practices in service definition and data model design.
  Community Forums: Consider checking SAP Community forums or other developer forums for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the issue causing the /IWFND/MED_CHECK018 error in your SAP OData service.