How To Fix KN456 - Locked key fields must be output

SAP Error Message - Details

• Message type: E = Error

• Message class: KN - Reporting for Costing

• Message number: 456

• Message text: Locked key fields must be output

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message KN456 - Locked key fields must be output ?

  The SAP error message KN456 ("Locked key fields must be output") typically occurs in the context of data processing in SAP, particularly when dealing with master data records such as customer or vendor data. This error indicates that certain key fields that are required for processing are locked and must be included in the output.
  
  Cause:
  
  Locked Key Fields: The error usually arises when the system is trying to process a transaction or report that requires certain key fields (like customer number, vendor number, etc.) to be included in the output, but these fields are locked or not accessible.
  Data Integrity Issues: There may be issues with data integrity or consistency, where the system cannot retrieve the necessary key fields due to locks or restrictions.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access certain key fields, leading to this error.
  
  
  Solution:
  
  Check Field Status: Ensure that the key fields required for