How To Fix CRM_EXT_REF402 - Additional external reference type &1 is not defined

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_EXT_REF - Messages for Add. External References Set

• Message number: 402

• Message text: Additional external reference type &1 is not defined

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 CRM_EXT_REF402 - Additional external reference type &1 is not defined ?

  The SAP error message "CRM_EXT_REF402: Additional external reference type &1 is not defined" typically occurs in the context of SAP Customer Relationship Management (CRM) when the system encounters an external reference type that has not been properly defined in the system configuration.
  Cause:
  
  
  Undefined External Reference Type: The error indicates that the external reference type specified (represented by &1 in the message) is not recognized by the system. This could be due to:
  
  The reference type not being created in the system.
  A typo or incorrect reference type being used in the transaction or configuration.
  Missing configuration in the relevant customizing settings.
  
  
  
  Configuration Issues: The external reference types are usually defined in the customizing settings of SAP. If the necessary configuration has not been completed, the system will not recognize the reference type.
  
  
  Solution:
  
  
  Check Configuration:
  
  Go to the SAP Customizing Implementation Guide (IMG) and navigate to the relevant section for defining external reference types. This is typically found under:
  
  Customer Relationship Management -> Master Data -> External Reference Types.
  
  
  Ensure that the external reference type you are trying to use is defined in the system.
  
  
  
  Create or Modify External Reference Type:
  
  If the reference type is not defined, you will need to create it. Make sure to provide all necessary details and save your changes.
  If it exists but is not functioning as expected, check for any inconsistencies or errors in its configuration.
  
  
  
  Check for Typos:
  
  Verify that the reference type being used in your transaction or program is spelled correctly and matches the defined types in the system.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for additional context on external reference types and their usage within CRM.
  
  
  
  Testing:
  
  After making changes, test the transaction or process again to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like SPRO to access the IMG or CRMD_ORDER to work with CRM orders.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Support: If the issue persists after checking the configuration, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  By following these steps, you should be able to resolve the "CRM_EXT_REF402" error and ensure that the external reference types are correctly defined and utilized in your SAP CRM system.