How To Fix CNV_MBT_DEX079 - Error while updating preselection tables

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT_DEX - DMIS Data Extract related messages

• Message number: 079

• Message text: Error while updating preselection tables

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT_DEX079 - Error while updating preselection tables ?

  The SAP error message CNV_MBT_DEX079 typically occurs during the data migration process, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there was an issue while updating the preselection tables, which are used to manage the data that is being migrated.
  Causes:
  
  Data Integrity Issues: The data being migrated may have integrity issues, such as missing references or invalid entries that prevent the update of preselection tables.
  Configuration Errors: Incorrect configuration settings in the migration cockpit or the data migration tool can lead to this error.
  Database Locking: If the database tables are locked by another process, it can prevent updates from being made.
  Insufficient Authorizations: The user executing the migration may not have the necessary authorizations to update the preselection tables.
  Technical Issues: There may be underlying technical issues, such as database connectivity problems or issues with the migration tool itself.
  
  Solutions:
  
  Check Data Integrity: Review the data being migrated for any inconsistencies or missing references. Ensure that all required fields are populated correctly.
  Review Configuration: Verify the configuration settings in the migration cockpit or tool. Ensure that all parameters are set correctly and that the migration process is properly defined.
  Database Locks: Check for any database locks that may be preventing updates. You can use transaction codes like SM12 to view and manage locks.
  User Authorizations: Ensure that the user executing the migration has the necessary authorizations to perform updates on the preselection tables. You may need to consult with your SAP security team.
  Check Logs: Review the logs generated during the migration process for any additional error messages or warnings that could provide more context about the issue.
  Restart the Process: Sometimes, simply restarting the migration process can resolve transient issues.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps. You can search the SAP Support Portal for notes related to CNV_MBT_DEX079.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP documentation for the migration tool you are using, as it may contain specific guidelines or troubleshooting steps for common errors.
  
  If the issue persists after trying the above solutions, it may be necessary to contact SAP Support for further assistance.