How To Fix CNV_IUUC_REPLICATION326 - Change log failed for Mass Transfer &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_IUUC_REPLICATION - IUUC replication messages (HANA)

• Message number: 326

• Message text: Change log failed for Mass Transfer &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_IUUC_REPLICATION326 - Change log failed for Mass Transfer &1 ?

  The SAP error message CNV_IUUC_REPLICATION326 indicates that there was a failure in the change log for a mass transfer operation. This error typically occurs during data migration or replication processes, particularly when using the SAP Landscape Transformation (SLT) Replication Server or similar tools.
  Cause:
  The error can be caused by several factors, including:
  
  Data Consistency Issues: There may be inconsistencies in the data being transferred, such as missing records or invalid entries.
  Configuration Problems: Incorrect configuration settings in the SLT or the source/target systems can lead to replication failures.
  Database Locking: If the database tables involved are locked or if there are long-running transactions, this can prevent the change log from being updated.
  Insufficient Authorizations: The user or service account executing the mass transfer may not have the necessary permissions to write to the change log.
  Technical Issues: There could be underlying technical issues such as network problems, database connectivity issues, or system resource limitations.
  
  Solution:
  To resolve the CNV_IUUC_REPLICATION326 error, you can follow these steps:
  
  Check Logs: Review the SLT logs and the application logs (transaction SLG1) for more detailed error messages that can provide insights into the root cause.
  Data Validation: Ensure that the data being transferred is consistent and valid. Check for any missing or invalid records in the source system.
  Configuration Review: Verify the configuration settings in the SLT and ensure that they are correctly set up for the source and target systems.
  Database Locks: Check for any locks on the database tables involved in the mass transfer. You can use transaction SM12 to view and manage locks.
  User Authorizations: Ensure that the user or service account has the necessary authorizations to perform the mass transfer and update the change log.
  System Resources: Monitor system resources (CPU, memory, disk space) to ensure that there are no resource constraints affecting the replication process.
  Retry the Operation: After addressing the above issues, retry the mass transfer operation to see if the error persists.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation for SLT and data replication for best practices and configuration guidelines.
  Support: If the issue persists after following the above steps, consider reaching out to SAP Support for further assistance.
  
  By systematically addressing the potential causes, you should be able to resolve the CNV_IUUC_REPLICATION326 error and successfully complete the mass transfer operation.