How To Fix /IWFND/CM_MGW090 - Invalid Delta Token

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 090

• Message text: Invalid Delta Token

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW090 - Invalid Delta Token ?

  The SAP error message /IWFND/CM_MGW090 Invalid Delta Token typically occurs in the context of OData services when using the Delta Query feature. This feature allows clients to retrieve only the changes (new or modified records) since the last request, which is particularly useful for optimizing data transfer and improving performance.
  Cause:
  The "Invalid Delta Token" error can arise due to several reasons:
  
  
  Expired Delta Token: The delta token may have expired or is no longer valid. Delta tokens are often time-sensitive and can become invalid after a certain period or after a certain number of changes.
  
  
  Incorrect Token Format: The token may be malformed or not properly formatted, leading to the inability of the system to recognize it.
  
  
  Data Changes: If the underlying data has changed significantly (e.g., records have been deleted or modified in a way that affects the delta tracking), the token may no longer be valid.
  
  
  Service Configuration Issues: There may be issues with the configuration of the OData service or the underlying data model that prevent the delta token from being processed correctly.
  
  
  Client-Side Issues: The client application may not be handling the delta token correctly, leading to the transmission of an invalid token.
  
  
  Solution:
  To resolve the /IWFND/CM_MGW090 Invalid Delta Token error, you can try the following steps:
  
  
  Refresh the Delta Token: If the token has expired, you may need to perform a full data retrieval (initial request) to obtain a new delta token.
  
  
  Check Token Format: Ensure that the delta token being sent in the request is correctly formatted and valid.
  
  
  Review Data Changes: Investigate any significant changes in the underlying data that may have affected the delta tracking. If necessary, reset the delta tracking.
  
  
  Service Configuration: Verify the configuration of the OData service and ensure that it is set up correctly to handle delta queries.
  
  
  Client-Side Debugging: If you are developing a client application, check the code that handles the delta token to ensure it is being processed and sent correctly.
  
  
  Consult Logs: Check the SAP Gateway logs for more detailed error messages or stack traces that can provide additional context about the issue.
  
  
  SAP Notes and Documentation: Look for relevant SAP Notes or documentation that may address known issues or provide guidance on handling delta tokens.
  
  
  Related Information:
  
  OData Services: Understanding how OData services work, especially with respect to delta queries, can help in troubleshooting these types of errors.
  SAP Gateway: Familiarity with the SAP Gateway framework and its configuration can be beneficial.
  SAP Community: Engaging with the SAP Community or forums can provide insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.