How To Fix 5A420 - Only entry 1 = attendee or 2 = business event allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: 5A - Basis Personnel Management

• Message number: 420

• Message text: Only entry 1 = attendee or 2 = business event allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 5A420 - Only entry 1 = attendee or 2 = business event allowed ?

  The SAP error message 5A420 indicates that there is an issue with the data being processed in the context of event management, specifically related to the attendance of participants in a business event. The message states that only one of the two entries is allowed: either an attendee or a business event.
  Cause:
  This error typically occurs when the system is trying to process a record that includes both an attendee and a business event simultaneously, which is not permitted. The system expects either an attendee (individual participant) or a business event (the event itself) to be specified, but not both at the same time.
  Solution:
  To resolve this error, you should:
  
  
  Check the Input Data: Review the data you are trying to process. Ensure that you are only specifying either an attendee or a business event, but not both. 
  
  
  Adjust the Configuration: If you are using a custom program or interface, ensure that the logic correctly handles the distinction between attendees and business events. Modify the code to prevent both entries from being included in the same transaction.
  
  
  Review Event Management Settings: If applicable, check the configuration settings in the SAP Event Management module to ensure that they are set up correctly and that there are no conflicting settings.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for more detailed information on the specific transaction or function you are using. This can provide insights into the expected data structure.
  
  
  Testing: After making the necessary adjustments, test the process again to ensure that the error no longer occurs.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Transaction Codes: Familiarize yourself with the transaction codes related to event management, such as EVT1 for event management or EVT2 for event registration, to better understand where the error might be occurring.
  User Forums: Consider visiting SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  If the problem persists after following these steps, it may be beneficial to reach out to your SAP support team or consult with an SAP expert for further assistance.