How To Fix MQ027 - System error occurred when locking data

SAP Error Message - Details

• Message type: E = Error

• Message class: MQ - Messages for Euro Changeover Package

• Message number: 027

• Message text: System error occurred when locking data

What causes this issue?

After starting a program, the system generates a lock entry in central
lock management. This ensures that the program cannot be started a
second time.
An error occurred when entering this lock entry.

System Response

The lock ccould not be set.

How to fix this error?

If the program has already been started, you should not interrupt this
run.
If the program has not been started and the lock entry has been set by
mistake, delete this entry manually.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MQ027 - System error occurred when locking data ?

  The SAP error message MQ027, which states "System error occurred when locking data," typically indicates that there is an issue with the system's ability to lock data for processing. This can occur in various scenarios, such as during data updates, transactions, or when accessing certain resources.
  Causes:
  
  Database Lock Conflicts: Another transaction may be holding a lock on the data you are trying to access or modify.
  System Performance Issues: High load on the database or application server can lead to timeouts or failures in acquiring locks.
  
  Configuration Issues: Incorrect settings in the SAP system or database configuration can lead to locking problems.
  Network Issues: Connectivity problems between the application server and the database can cause locking errors.
  Software Bugs: There may be bugs in the SAP software or in custom code that lead to locking issues.
  
  Solutions:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. If you find locks that are no