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

UCS0042 - Overview

• 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.

UCS0042 - Details

• 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