How To Fix NSDM_MESSAGES030 - Table &1 is locked

SAP Error Message - Details

• Message type: E = Error

• Message class: NSDM_MESSAGES - Messages MM-IM new simplified data model

• Message number: 030

• Message text: Table &1 is locked

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message NSDM_MESSAGES030 - Table &1 is locked ?

  The SAP error message NSDM_MESSAGES030 indicates that a specific table (denoted as &1 in the message) is locked. This typically occurs when a transaction is trying to access or modify a table that is currently locked by another process. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause
  
  Concurrent Access: Another user or process is currently accessing the table, which prevents your transaction from obtaining the necessary lock.
  Long-Running Transactions: A transaction that takes a long time to complete may hold a lock on the table longer than expected.
  Deadlocks: In some cases, a deadlock situation may arise where two or more processes are waiting for each other to release locks.
  System Issues: Occasionally, system issues or bugs can lead to locks not being released properly.
  
  Solution
  
  
  Identify the Lock:
  
  Use transaction code SM12 to view and manage locks. You can check which user or process is holding the lock on the table.
  Look for the specific table name in the list of locked entries.
  
  
  
  Release the Lock:
  
  If you identify a lock that is no longer needed (e.g., a user has left a session open), you can manually delete the lock entry from SM12. However, be cautious when doing this, as it may disrupt the other user's work.
  
  
  
  Wait and Retry:
  
  If the lock is held by a legitimate process that is still running, you may need to wait for that process to complete before retrying your transaction.
  
  
  
  Check for Long-Running Transactions:
  
  Investigate if there are any long-running transactions that could be optimized or terminated if they are no longer needed.
  
  
  
  Review System Performance:
  
  If locks are a frequent issue, consider reviewing system performance and transaction design to minimize locking conflicts.
  
  
  
  Consult with Basis Team:
  
  If the issue persists or if you suspect a deeper system issue, consult with your SAP Basis team for further analysis and resolution.
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related errors or warnings.
  ST22: To check for dumps that might indicate underlying issues.
  SM37: To monitor background jobs that might be causing locks.
  
  
  
  Best Practices:
  
  Design transactions to minimize locking conflicts, such as using shorter transaction times and avoiding long-running updates.
  Regularly monitor and analyze system performance to identify potential bottlenecks.
  
  
  
  By following these steps, you should be able to address the NSDM_MESSAGES030 error effectively.