How To Fix CNV_OT_PCL018 - Unable to delete preselection table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_OT_PCL - Messages for PCL of generic OBT parts

• Message number: 018

• Message text: Unable to delete preselection table &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_OT_PCL018 - Unable to delete preselection table &1 ?

  The SAP error message CNV_OT_PCL018, which states "Unable to delete preselection 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 the system is unable to delete a specific preselection table, which is often a temporary table used during the migration process.
  Causes:
  
  Table Locking: The preselection table may be locked by another process or user, preventing deletion.
  Insufficient Authorizations: The user executing the deletion may not have the necessary authorizations to delete the table.
  Active Sessions: There may be active sessions or transactions that are still using the preselection table.
  Database Constraints: There could be database constraints or dependencies that prevent the deletion of the table.
  Incomplete Migration Process: If the migration process was interrupted or not completed, it might leave the preselection table in an inconsistent state.
  
  Solutions:
  
  Check for Locks: Use transaction codes like SM12 to check for any locks on the preselection table. If locks are found, you may need to wait for the locks to be released or contact the user holding the lock.
  Verify Authorizations: Ensure that the user has the necessary authorizations to delete the preselection table. You may need to consult with your SAP security team.
  End Active Sessions: Check for any active sessions that might be using the preselection table. You can use transaction SM66 to monitor active processes and terminate any that are no longer needed.
  Check Database Constraints: Review any database constraints that might be preventing the deletion. This may require assistance from your database administrator.
  Restart the Migration Process: If the migration process was interrupted, consider restarting it. Ensure that all previous steps are completed successfully before attempting to delete the preselection table.
  Manual Deletion: If necessary, you can attempt to manually delete the preselection table using transaction SE14 (Database Utility) or through SQL commands, but this should be done with caution and typically as a last resort.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional context or solutions for this error. You can search the SAP Support Portal for notes related to CNV_OT_PCL018.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific migration tool you are using for any known issues or troubleshooting steps.
  SAP Community: Consider searching or posting in the SAP Community forums for insights from other users who may have encountered the same issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to contact SAP Support for further assistance.