How To Fix /IWFND/CM_UM008 - &1 exceeds the maximum length for an external ID number

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_UM -

• Message number: 008

• Message text: &1 exceeds the maximum length for an external ID number

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_UM008 - &1 exceeds the maximum length for an external ID number ?

  The SAP error message /IWFND/CM_UM008 &1 exceeds the maximum length for an external ID number typically occurs in the context of SAP Gateway or OData services when an external ID being processed exceeds the defined maximum length for that field. This can happen during data transfer or when trying to create or update records in the system.
  Cause:
  
  Exceeding Length Limit: The external ID being used in the request exceeds the maximum length defined in the system. This could be due to incorrect data being sent from the client application or a misconfiguration in the data model.
  Data Model Configuration: The data model in the SAP system may have a defined maximum length for external IDs, and the incoming data does not comply with this limit.
  Incorrect Mapping: If there is a mapping issue between the source system and the SAP system, it may lead to longer IDs being sent than what is expected.
  
  Solution:
  
  Check the Length of External ID: Verify the length of the external ID being sent in the request. Ensure that it does not exceed the maximum length defined in the SAP system.
  Adjust Data in Client Application: If the external ID is being generated or sent from a client application, modify the logic to ensure that the ID adheres to the maximum length constraints.
  Review Data Model: Check the data model in the SAP system to confirm the maximum length defined for the external ID. If necessary, adjust the data model to accommodate longer IDs, but be cautious as this may have implications on other parts of the system.
  Error Handling: Implement error handling in the client application to catch such errors and provide meaningful feedback to users or logs for troubleshooting.
  Testing: After making changes, test the integration thoroughly to ensure that the issue is resolved and that no new issues are introduced.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  OData Service Documentation: Review the documentation for the specific OData service you are using to understand the expected formats and constraints for external IDs.
  Debugging: If you have access to the SAP system, consider using transaction codes like /IWFND/ERROR_LOG to get more details about the error and its context.
  Community Forums: Engage with SAP community forums or support channels for additional insights or similar experiences from other users.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.