How To Fix CKMLAGGR004 - Execute selection before starting aggregation

CKMLAGGR004 - Overview

• Message type: E = Error

• Message class: CKMLAGGR - Aggregation

• Message number: 004

• Message text: Execute selection before starting aggregation

Self-Explanatory Message

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CKMLAGGR004 - Details

• The SAP error message CKMLAGGR004 ("Execute selection before starting aggregation") typically occurs in the context of the Material Ledger (ML) when you are trying to perform an aggregation process without having executed a selection first. This error is often encountered during the execution of the Material Ledger closing activities, particularly when dealing with actual costing and inventory valuation.
  
  Cause:
  The error is caused by the following reasons:
  
  Missing Selection: The aggregation process requires a selection of materials or periods to be defined before it can proceed. If this selection is not made, the system cannot determine which data to aggregate.
  Incorrect Sequence of Operations: The aggregation process must follow a specific sequence of operations. If the selection step is skipped or not executed properly, the aggregation cannot be initiated.
  
  
  Solution:
  To resolve the CKMLAGGR004 error, follow these steps:
  
  
  Execute Selection:
  
  Go to the transaction code related to the Material Ledger (e.g., CKMLCP for closing activities).
  Ensure that you have