How To Fix /IWFND/CM_GSR028 - Key was not supplied for the new list item/node.

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_GSR -

• Message number: 028

• Message text: Key was not supplied for the new list item/node.

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_GSR028 - Key was not supplied for the new list item/node. ?

  The SAP error message /IWFND/CM_GSR028 Key was not supplied for the new list item/node typically occurs in the context of SAP Gateway and OData services. This error indicates that a required key for a new entity or list item is missing when trying to create or update data through an OData service.
  Cause:
  
  Missing Key Property: The entity type defined in the OData service requires a key property that is not being supplied in the request.
  Incorrect Request Format: The request payload may not be structured correctly, leading to the omission of key fields.
  Service Definition Issues: The OData service might not be properly defined, or the metadata might not be correctly configured to include the necessary key fields.
  Client-Side Issues: The client application (e.g., Fiori app, custom UI) may not be sending the required key information when making the request.
  
  Solution:
  
  
  Check the OData Service Metadata:
  
  Use the /IWFND/MAINT_SERVICE transaction to check the service definition and ensure that the key properties are correctly defined in the entity type.
  Verify that the key properties are marked as required.
  
  
  
  Review the Request Payload:
  
  Inspect the request being sent to the OData service. Ensure that all required key fields are included in the payload.
  If you are using a tool like Postman or a browser's developer tools, you can capture the request and check the JSON/XML structure.
  
  
  
  Update the Client Application:
  
  If the client application is not sending the key, update the logic to include the necessary key fields when creating or updating entities.
  Ensure that the client-side code correctly constructs the request payload according to the OData service specifications.
  
  
  
  Debugging:
  
  Use transaction SLG1 to check for logs related to the error. This can provide more context on what might be going wrong.
  If you have access to the backend code, consider debugging the OData service implementation to see where the key is expected and why it might be missing.
  
  
  
  Testing:
  
  After making changes, test the OData service again to ensure that the error is resolved and that the entity can be created or updated successfully.
  
  
  
  Related Information:
  
  OData Service Documentation: Review the official SAP documentation on OData services to understand how to define entities and keys properly.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide additional guidance on this error.
  Community Forums: Engage with the SAP Community or forums like SAP Community Network (SCN) for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.