How To Fix /SAPAPO/LCM201 - SNP master data queue cannot be locked; process is terminated

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/LCM -

• Message number: 201

• Message text: SNP master data queue cannot be locked; process is terminated

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/LCM201 - SNP master data queue cannot be locked; process is terminated ?

  The SAP error message /SAPAPO/LCM201 indicates that the SNP (Supply Network Planning) master data queue cannot be locked, which leads to the termination of the process. This error typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there are issues related to data locking mechanisms.
  Causes:
  
  Concurrent Access: The most common cause is that another process is currently accessing the SNP master data, preventing your process from obtaining the necessary lock.
  Long-Running Transactions: If a transaction is taking too long to complete, it may hold onto the lock longer than expected, causing subsequent processes to fail.
  System Performance Issues: High system load or performance issues can lead to delays in lock acquisition.
  Configuration Issues: Incorrect configuration of the locking mechanism or master data settings can also lead to this error.
  Database Locks: Sometimes, database-level locks can interfere with the application-level locks.
  
  Solutions:
  
  Check for Active Processes: Use transaction codes like SM12 (to check for locks) and SM66 (to view active processes) to identify if another user or process is holding the lock. If you find a long-running transaction, you may need to terminate it if it's safe to do so.
  Wait and Retry: If the lock is temporary, waiting for a few moments and then retrying the operation may resolve the issue.
  System Performance Monitoring: Monitor system performance and resource usage to ensure that the system is not overloaded. Address any performance bottlenecks.
  Review Configuration: Check the configuration settings related to SNP and master data to ensure they are set up correctly.
  Database Administration: If database locks are suspected, consult with your database administrator to identify and resolve any underlying database issues.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches and updates.
  
  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: Refer to the official SAP documentation for detailed information on SNP and locking mechanisms.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to escalate the issue to your SAP Basis team or SAP support for further investigation.