How To Fix CNV_CDOP_CA155 - Required locks could not be set

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CDOP_CA - CDOP Clearing Analysis

• Message number: 155

• Message text: Required locks could not be set

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_CDOP_CA155 - Required locks could not be set ?

  The SAP error message CNV_CDOP_CA155: Required locks could not be set 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 was unable to acquire the necessary locks on the database objects that are required for the migration process to proceed safely.
  Causes:
  
  Concurrent Processes: Other processes or transactions may be holding locks on the same database objects that the migration process needs to access.
  Long-Running Transactions: If there are long-running transactions in the system, they may prevent the migration process from acquiring the necessary locks.
  Database Locking Issues: There may be issues related to database locking mechanisms that prevent the migration tool from obtaining the required locks.
  Configuration Issues: Incorrect configuration of the migration tool or the underlying database settings may lead to locking problems.
  
  Solutions:
  
  Check for Active Processes: Use transaction codes like SM12 (to check for locks) and SM66 (to view active processes) to identify any long-running or blocking processes. If you find any, consider terminating them if they are not critical.
  Retry the Migration: Sometimes, simply retrying the migration process after a short wait can resolve the issue, especially if the locks were temporary.
  Schedule Downtime: If possible, schedule the migration during a maintenance window when fewer users are active in the system, reducing the likelihood of lock contention.
  Increase Lock Timeout: If the system allows, consider increasing the lock timeout settings to give the migration process more time to acquire the necessary locks.
  Review Migration Configuration: Ensure that the migration tool is correctly configured and that all prerequisites are met before starting the migration process.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12, SM21, SM66, and ST22 for monitoring locks, system logs, active processes, and dumps, respectively.
  SAP Documentation: Review the official SAP documentation for the migration tool you are using, as it may provide specific guidance on handling locking issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.