How To Fix /SCWM/MFS158 - Communication point &1 &2 is locked by a parallel process

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/MFS -

• Message number: 158

• Message text: Communication point &1 &2 is locked by a parallel process

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/MFS158 - Communication point &1 &2 is locked by a parallel process ?

  The SAP error message /SCWM/MFS158 Communication point &1 &2 is locked by a parallel process typically occurs in the context of the SAP Extended Warehouse Management (EWM) system, particularly when dealing with the Material Flow System (MFS). This error indicates that a communication point (which could be a physical location or a logical point in the warehouse) is currently locked by another process, preventing the current operation from proceeding.
  Cause:
  
  Concurrent Processes: The most common cause of this error is that another process is currently using the same communication point. This could happen if multiple transactions or processes are trying to access or modify the same resource simultaneously.
  Long-Running Transactions: If a previous transaction is taking longer than expected to complete, it may hold a lock on the communication point, leading to this error for subsequent transactions.
  System Configuration: Incorrect configuration of the MFS or warehouse processes may lead to locking issues.
  
  Solution:
  
  
  Identify the Locking Process:
  
  Use transaction SM12 to check for locks in the system. You can filter by the communication point or user to identify which process is holding the lock.
  If you find a lock that is no longer needed, you can delete it (if you have the necessary authorizations).
  
  
  
  Wait and Retry:
  
  If the locking process is legitimate and expected to complete soon, you may simply need to wait for it to finish and then retry your operation.
  
  
  
  Review Process Design:
  
  Analyze the processes that are accessing the communication point to ensure that they are designed to minimize locking conflicts. This may involve optimizing the sequence of operations or adjusting the timing of processes.
  
  
  
  Check for System Performance Issues:
  
  If transactions are taking longer than expected, investigate system performance. Look for bottlenecks in processing that may be causing delays.
  
  
  
  Configuration Review:
  
  Review the configuration of the MFS and warehouse processes to ensure they are set up correctly and efficiently.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to MFS and EWM for any specific recommendations or known issues related to locking.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM12 (to view and manage locks)
  SM21 (to check system logs for errors)
  SLG1 (to view application logs)
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Performance Monitoring: Use tools like ST22 (dump analysis) and SM37 (job monitoring) to analyze system performance and job statuses.
  
  
  By following these steps, you should be able to diagnose and resolve the issue related to the /SCWM/MFS158 error message in SAP.