How To Fix CNV_20100642 - Duplicative COES keys found

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20100 - Messageclass for chart of account conversion

• Message number: 642

• Message text: Duplicative COES keys found

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20100642 - Duplicative COES keys found ?

  The SAP error message CNV_20100642 indicates that there are duplicative COES (Controlling Object Entry Sheet) keys found during a data migration or conversion process. This error typically arises in the context of SAP's data migration tools, particularly when using the SAP S/4HANA Migration Cockpit or other conversion tools.
  Cause:
  The error is caused by the presence of duplicate entries in the COES table, which is used to store controlling object entries. This can happen due to:
  
  Data Duplication: The source system may have duplicate records for the same controlling object, leading to conflicts during the migration.
  Incorrect Mapping: During the mapping of data from the legacy system to the target system, if the same key is mapped to multiple records, it can result in duplicates.
  Data Quality Issues: Poor data quality in the source system can lead to inconsistencies and duplicates.
  
  Solution:
  To resolve the CNV_20100642 error, you can follow these steps:
  
  
  Identify Duplicates:
  
  Use SQL queries or data analysis tools to identify the duplicate entries in the COES table in the source system.
  Check for duplicates based on the key fields that define uniqueness in the COES table.
  
  
  
  Data Cleansing:
  
  Once duplicates are identified, you need to decide how to handle them. This may involve:
  
  Merging duplicate records.
  Deleting unnecessary duplicates.
  Correcting any data inconsistencies.
  
  
  
  
  
  Adjust Mapping:
  
  Review the mapping configuration in the migration tool to ensure that it correctly reflects the intended relationships and does not create duplicates.
  
  
  
  Re-run Migration:
  
  After cleaning the data and adjusting the mapping, re-run the migration process to see if the error persists.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using for any additional guidance or best practices.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions for this specific error.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP, including data validation and cleansing techniques.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered and resolved similar issues.
  
  By following these steps, you should be able to address the CNV_20100642 error and successfully complete your data migration process.