How To Fix CNV051 - In table &1, &2 records were read and &3 records were changed.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 051

• Message text: In table &1, &2 records were read and &3 records were changed.

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV051 - In table &1, &2 records were read and &3 records were changed. ?

  The SAP error message CNV051 typically occurs during data migration or conversion processes, particularly when using the SAP Data Migration Workbench or similar tools. This message indicates that a certain number of records were read from a specified table, but a different number of records were changed or updated. 
  Cause:
  
  Data Inconsistency: The records in the source table may not match the expected format or structure, leading to discrepancies in the number of records processed.
  Conversion Logic Issues: There may be issues in the conversion logic or mapping rules that lead to records being skipped or not updated correctly.
  Locking Issues: If the table is being accessed by multiple processes, it may lead to locking issues that prevent records from being updated.
  Validation Errors: Some records may fail validation checks, causing them not to be updated, while others are processed successfully.
  
  Solution:
  
  Review Logs: Check the detailed logs generated during the migration process to identify which records were not changed and why.
  Data Validation: Ensure that the data in the source table meets the required format and constraints. Cleanse the data if necessary.
  Adjust Mapping Rules: Review and adjust the mapping rules or conversion logic to ensure that all records are processed as expected.
  Check for Locks: Ensure that there are no locks on the table that could prevent updates. You may need to coordinate with other processes accessing the same table.
  Test in Smaller Batches: If possible, test the migration process with smaller batches of data to isolate the issue and identify specific records causing problems.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any known issues or additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE16 (Data Browser) to inspect the data in the affected tables.
  SAP Notes: Search for SAP Notes related to the CNV051 message for any specific patches or updates that may address known issues.
  Community Forums: Engage with SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the CNV051 error effectively.