How To Fix UKM_COMM001 - Conflicting lock with &1: &2

SAP Error Message - Details

• Message type: E = Error

• Message class: UKM_COMM - Messages for Liability Update and Line Item Update

• Message number: 001

• Message text: Conflicting lock with &1: &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message UKM_COMM001 - Conflicting lock with &1: &2 ?

  The SAP error message UKM_COMM001 indicates a conflicting lock situation in the system. This typically occurs when two processes or transactions are trying to access the same resource simultaneously, leading to a lock conflict. The message format usually includes details about the conflicting lock, such as the user or transaction that holds the lock.
  Cause:
  
  Concurrent Access: Multiple users or processes are trying to access the same data or object at the same time.
  Long-Running Transactions: A transaction that takes a long time to complete may hold a lock longer than expected, preventing other transactions from accessing the same resource.
  Improper Lock Management: In some cases, locks may not be released properly due to programming errors or system issues.
  
  Solution:
  
  Identify the Lock: Use transaction codes like SM12 (Display and Delete Locks) to identify the user or transaction that is holding the lock. You can check the lock entries and see which user or process is causing the conflict.
  Wait for Release: If the lock is held by a legitimate process, you may need to wait for it to complete. Monitor the transaction to see if it finishes soon.
  Terminate the Lock: If the lock is held by a process that is no longer active or is stuck, you may need to delete the lock entry using transaction SM12. Be cautious with this approach, as it may lead to data inconsistencies if the process is still running.
  Review Code: If the issue is recurring, review the code of the transactions involved to ensure that locks are being managed properly and released in a timely manner.
  Increase Lock Timeout: In some cases, adjusting the lock timeout settings in the system configuration may help alleviate the issue, but this should be done with caution and proper understanding of the implications.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related errors or warnings.
  ST22: To analyze dumps that may provide insight into the issue.
  
  
  Documentation: Refer to SAP Notes and documentation related to lock management and troubleshooting lock conflicts for more detailed guidance.
  Performance Monitoring: Regularly monitor system performance and transaction execution times to identify potential bottlenecks that could lead to lock conflicts.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.