How To Fix MW091 - System error: locking object & key &

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 091

• Message text: System error: locking object & key &

What causes this issue?

An error occurred trying to block object &V1& with the key &V2&. The
error probably occurred in blocking administration.

System Response

INCLUDE ISR_VERARBEITUNG

How to fix this error?

INCLUDE ISR_VERWALTUNG

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW091 - System error: locking object & key & ?

  The SAP error message MW091, which states "System error: locking object & key &," typically indicates that there is an issue related to the locking mechanism in SAP. This error can occur when a transaction tries to access a resource that is currently locked by another transaction or process. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Lock Conflicts: The most common cause of this error is that another user or process is holding a lock on the object that your transaction is trying to access. This can happen if a previous transaction did not release the lock properly.
  Long-running Transactions: If a transaction takes too long to complete, it may hold locks longer than expected, causing other transactions to fail.
  System Issues: Occasionally, system issues or bugs can lead to improper handling of locks.
  Database Issues: Problems with the underlying database can also lead to locking issues.
  
  Solutions:
  
  
  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 object in question.
  If you find a lock that is no longer needed, you can delete it (if you have the necessary authorizations).
  
  
  
  Check for Long-running Transactions:
  
  Use transaction code SM66 to monitor active processes and identify any long-running transactions that may be holding locks.
  
  
  
  Restart the Transaction:
  
  Sometimes, simply restarting the transaction can resolve the issue if the lock was temporary.
  
  
  
  System Restart:
  
  In some cases, a system restart may be necessary to clear any lingering locks, especially if they are caused by a system issue.
  
  
  
  Consult Basis Team:
  
  If the issue persists, it may be necessary to involve your SAP Basis team to investigate further. They can check for system logs, database locks, and other underlying issues.
  
  
  
  Review Custom Code:
  
  If the error occurs in a custom program, review the code to ensure that locks are being handled correctly and that they are released appropriately.
  
  
  
  Related Information:
  
  Lock Objects: In SAP, lock objects are used to manage concurrent access to data. Understanding how lock objects work can help in troubleshooting locking issues.
  Transaction Codes:
  
  SM12: Display and manage locks.
  SM66: Monitor global work processes.
  SM21: Check system logs for errors.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking errors. You can search for relevant notes in the SAP Support Portal.
  
  Conclusion:
  The MW091 error is typically related to locking conflicts in SAP. By identifying the source of the lock and taking appropriate actions, you can resolve the issue. If the problem persists, further investigation by the Basis team or SAP support may be necessary.