How To Fix WRF_ARTICLELIST021 - Error during memory access - entry locked

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_ARTICLELIST - Mesage Class of Material List

• Message number: 021

• Message text: Error during memory access - entry locked

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_ARTICLELIST021 - Error during memory access - entry locked ?

  SAP Error Message:
  
  WRF_ARTICLELIST021 - Error during memory access - entry locked
  
  Cause
  This error typically occurs when a program or transaction tries to access a memory object or internal table entry that is currently locked by another process or user session. In the context of SAP Retail (where the WRF_ prefix is common), this usually means:
  
  A lock object related to article data or article lists is currently held by another user or process.
  The system is trying to update or read an entry that is locked to prevent concurrent modifications.
  The lock is not released due to an incomplete transaction, system crash, or long-running process.
  Possible deadlock or contention on shared memory objects or buffers.
  
  
  Explanation
  
  WRF_ARTICLELIST021 is an error message from the SAP Retail module, often related to article master data or article list processing.
  The "Error during memory access - entry locked" indicates that the program attempted to access a shared memory area or buffer that is locked.
  SAP uses enqueue/dequeue mechanisms to ensure data consistency. If an entry is locked, other processes must wait or handle the lock accordingly.
  This error can occur during batch jobs, data loads, or interactive transactions involving article data.
  
  
  Solution / Troubleshooting Steps
  
  
  Check Lock Entries:
  
  Use transaction SM12 to check for existing lock entries related to the article or object in question.
  Identify if there are stale or orphaned locks.
  If safe, delete the lock entries to release the lock.
  
  
  
  Identify the Lock Owner:
  
  In SM12, check which user or process holds the lock.
  Contact the user or wait for the process to complete.
  
  
  
  Review Long-Running or Stuck Jobs:
  
  Check for batch jobs or background processes that might be holding locks for a long time.
  Use SM37 to monitor jobs and cancel or restart if necessary.
  
  
  
  Check for Program or Custom Code Issues:
  
  If this error occurs frequently, review the custom code or standard SAP programs that handle article lists.
  Ensure proper lock handling and release mechanisms are implemented.
  
  
  
  System Performance and Buffer Issues:
  
  Sometimes memory or buffer contention can cause such errors.
  Check system logs (SM21) and dumps (ST22) for related errors.
  Consider system tuning or increasing buffer sizes if needed.
  
  
  
  SAP Notes and Support:
  
  Search for SAP Notes related to WRF_ARTICLELIST021 or memory access errors in SAP Retail.
  Apply any relevant patches or corrections.
  
  
  
  
  Related Information
  
  Transaction SM12: Display and manage lock entries.
  Transaction SM21: System log for error analysis.
  Transaction ST22: ABAP runtime error analysis.
  Transaction SM37: Job monitoring.
  SAP Retail Module: Article master data and article list processing.
  Enqueue/Dequeue Mechanism: SAP's locking mechanism to prevent concurrent data inconsistencies.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Attempt to access a locked memory entry or shared object related to article data.
  
  
  Effect
  Program cannot proceed due to lock contention, resulting in error WRF_ARTICLELIST021.
  
  
  Solution
  Check and clear locks in SM12, identify lock owners, review jobs, check custom code.
  
  
  Prevention
  Ensure proper lock handling in programs, avoid long-running locks, monitor system health.
  
  
  Tools
  SM12, SM21, ST22, SM37, SAP Notes.
  
  
  
  
  If you provide more context (transaction, program, or scenario), I can help with more specific guidance.