How To Fix CNV20400018 - Merges takes place in table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20400 - Message class CNV20400

• Message number: 018

• Message text: Merges takes place in table &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20400018 - Merges takes place in table &1 ?

  The SAP error message CNV20400018, which states "Merges take place in table &1," typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there are issues with merging records in a specific database table, which can be due to various reasons such as data inconsistencies, duplicate entries, or incorrect mapping.
  Cause:
  
  Duplicate Records: The error often arises when there are duplicate records in the source data that are being processed for migration. The system is unable to merge these records due to conflicts or inconsistencies.
  Data Inconsistencies: If the data being migrated does not conform to the expected format or business rules, it can lead to issues during the merge process.
  Incorrect Mapping: If the mapping of fields from the source to the target table is not correctly defined, it can cause conflicts during the merge operation.
  Referential Integrity Violations: If there are foreign key constraints or other integrity rules that are violated during the merge, the process will fail.
  
  Solution:
  
  Data Cleansing: Review the source data for duplicates and inconsistencies. Use data cleansing tools or manual checks to ensure that the data is clean before migration.
  Check Mapping: Verify the mapping of fields between the source and target tables. Ensure that all required fields are correctly mapped and that there are no conflicts.
  Adjust Migration Settings: If applicable, adjust the settings in the migration tool to handle duplicates or to specify how merges should be processed.
  Run Pre-Migration Checks: Use any available pre-migration checks or validation tools provided by SAP to identify potential issues before running the migration.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using for any additional guidelines or troubleshooting steps related to this error.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for data migration.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can provide insights or solutions.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.