How To Fix UCS0042 - System error while setting the transaction data lock

SAP Error Message - Details

• Message type: E = Error

• Message class: UCS0 - Messages for Status Management

• Message number: 042

• Message text: System error while setting the transaction data lock

What causes this issue?

When you attempted to lock the transaction data to be processed, an
internal error was established in the SAP lock management.

System Response

The SAP system cannot enter the requested lock correctly in the lock
table of the <DS:GLOS.352A9F79AAE85CD5E10000009B38F974>enqueue server
</>. Therefore, the enqueue function module triggers an appropriate ex
ception. If this exception is not intercepted and dealt with, this
automatically leads to the termination of the current transaction.

How to fix this error?

The most common reason for this error message is that the enqueue server
can no longer be accessed. The cause of this can be that either the
enqueue server itself or the message server, which creates the
connection between the application server and enqueue server in a
decentral system configuration, is no longer available.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UCS0042 - System error while setting the transaction data lock ?

  The SAP error message UCS0042, which indicates a "System error while setting the transaction data lock," typically arises when there is an issue with the locking mechanism in the SAP system. This can occur during various operations, such as data updates or transactions that require exclusive access to certain data records.
  Causes:
  
  Database Lock Issues: The error may occur if there are problems with the database locks, such as deadlocks or contention for resources.
  System Performance: High system load or performance issues can lead to timeouts or failures in setting locks.
  Configuration Issues: Incorrect configuration settings in the SAP system or database can lead to locking problems.
  Transport Issues: If there are ongoing transports or changes being made to the system, it may interfere with the locking mechanism.
  User Authorizations: Insufficient authorizations for the user trying to perform the transaction can also lead to this error.
  
  Solutions:
  
  Check System Logs: Review the system logs (transaction SM21) for any related error messages or warnings that could provide more context about the issue.
  Transaction SM12: Use transaction SM12 to check for any orphaned locks. If you find locks that should not be there, you can delete them, but be cautious as this can affect other users.
  Performance Monitoring: Monitor system performance using transaction ST22 (dump analysis) and SM37 (job monitoring) to identify any performance bottlenecks.
  Database Administration: Consult with your database administrator to check for any issues at the database level, such as deadlocks or resource contention.
  User Authorizations: Ensure that the user has the necessary authorizations to perform the transaction. You can check this using transaction SU53 after the error occurs.
  Restart the Application Server: In some cases, restarting the application server can resolve temporary locking issues.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches or updates.
  
  Related Information:
  
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including transaction codes, user IDs, and any relevant logs.
  Documentation: Review SAP documentation related to transaction locking and performance tuning to better understand how locks are managed in your environment.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and resolve the UCS0042 error in your SAP system.