How To Fix MQ158 - System lock could not be set

SAP Error Message - Details

• Message type: E = Error

• Message class: MQ - Messages for Euro Changeover Package

• Message number: 158

• Message text: System lock could not be set

What causes this issue?

To lock the system, the active package must have completed the ANALYZE
phase successfully.
The following causes of error are possible:
There is no package flagged as <LS>active</>
The active package is in the wrong phase
The active package is in the ANALYZE phase which was not completed
properly.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MQ158 - System lock could not be set ?

  The SAP error message MQ158, which states "System lock could not be set," typically indicates that there is an issue with acquiring a lock on a particular object or resource in the SAP system. This can occur in various scenarios, such as during data processing, updates, or when multiple users are trying to access the same resource simultaneously.
  Causes:
  
  Concurrency Issues: Multiple users or processes are trying to access or modify the same data simultaneously, leading to a conflict in acquiring the necessary locks.
  Long-Running Transactions: If a transaction takes too long to complete, it may hold onto locks longer than expected, preventing other transactions from acquiring the necessary locks.
  Deadlocks: Situations where two or more processes are waiting for each other to release locks can lead to a deadlock, causing the system to be unable to set a lock.
  System Configuration: Incorrect configuration of lock parameters or insufficient resources allocated to handle locking mechanisms can also lead to this error.
  Database Issues: Problems with the underlying database, such as corruption or misconfiguration, can affect the locking mechanism.
  
  Solutions:
  
  Check for Long-Running Transactions: Identify and analyze any long-running transactions that may be holding locks. You can use transaction codes like SM12 (for lock entries) and SM21 (for system logs) to investigate.
  Review User Activity: Monitor user activity to see if multiple users are trying to access the same data simultaneously. If possible, coordinate user access to avoid conflicts.
  Increase Lock Timeout: If applicable, consider increasing the lock timeout settings in the system configuration to allow more time for locks to be acquired.
  Database Maintenance: Perform regular database maintenance to ensure that the database is functioning correctly and is not causing locking issues.
  System Configuration Review: Review the system configuration related to locks and ensure that it is set up correctly to handle the expected load.
  Restart the Application: In some cases, restarting the application or the SAP instance may help clear any lingering locks or issues.
  
  Related Information:
  
  Transaction Codes: 
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for errors and warnings.
  SM37: To monitor background jobs and their statuses.
  
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to locking issues. You can search the SAP Support Portal for relevant notes.
  Performance Monitoring: Use tools like ST03N (Workload Analysis) to monitor system performance and identify bottlenecks that may be causing locking issues.
  
  If the problem persists after trying the above solutions, it may be necessary to consult with SAP support or your system administrator for further investigation and resolution.