How To Fix UGMD399 - ************** Messages for ENQUEUE/DEQUEUE Method *******************

SAP Error Message - Details

• Message type: E = Error

• Message class: UGMD - FIN Master Data: Messages

• Message number: 399

• Message text: ************** Messages for ENQUEUE/DEQUEUE Method *******************

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UGMD399 - ************** Messages for ENQUEUE/DEQUEUE Method ******************* ?

  The SAP error message UGMD399 is related to the enqueue and dequeue mechanisms in SAP, which are used for locking and unlocking objects in the system to ensure data consistency during concurrent access. This error typically indicates that there is an issue with the locking mechanism, which can occur for various reasons.
  Cause:
  
  
  Lock Conflicts: The most common cause of this error is that a lock request is being made for an object that is already locked by another user or process. This can happen if multiple users or processes are trying to access the same data simultaneously.
  
  
  Deadlocks: A deadlock situation can occur when two or more processes are waiting for each other to release locks, leading to a standstill.
  
  
  System Configuration Issues: There may be configuration issues in the SAP system that affect how locks are managed.
  
  
  Database Issues: Problems with the underlying database can also lead to locking issues.
  
  
  Long-running Transactions: If a transaction takes too long to complete, it can hold locks for an extended period, causing other transactions to fail.
  
  
  Solution:
  
  
  Identify Lock Holders: Use transaction code SM12 to check for existing locks. You can identify which user or process is holding the lock and take appropriate action, such as waiting for the lock to be released or contacting the user.
  
  
  Release Locks: If necessary, you can manually delete locks in SM12, but be cautious as this can lead to data inconsistency if not handled properly.
  
  
  Review Code: If the error is occurring in a custom program, review the code to ensure that locks are being managed correctly. Ensure that locks are released as soon as they are no longer needed.
  
  
  Optimize Transactions: If long-running transactions are causing locks, consider optimizing the code to reduce execution time.
  
  
  Check for Deadlocks: Use transaction SM21 to check the system log for deadlock situations and analyze the processes involved.
  
  
  System Configuration: Review the configuration settings related to locking in the SAP system to ensure they are set up correctly.
  
  
  Database Performance: Monitor the performance of the database to ensure it is not contributing to locking issues.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage locks.
  SM21: System log for monitoring.
  ST22: Dump analysis for ABAP runtime errors.
  SM37: Job monitoring to check for long-running jobs.
  
  
  
  SAP Notes: Check SAP Notes related to locking issues for specific guidance and patches that may address known problems.
  
  
  Documentation: Review SAP documentation on enqueue and dequeue mechanisms for a deeper understanding of how locks work in the system.
  
  
  If the problem persists after trying the above solutions, it may be necessary to involve SAP support for further investigation.