How To Fix >A155 - Deletion object &1, main table &2, is being processed in parallel

SAP Error Message - Details

• Message type: E = Error

• Message class: >A -

• Message number: 155

• Message text: Deletion object &1, main table &2, is being processed in parallel

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message >A155 - Deletion object &1, main table &2, is being processed in parallel ?

  The SAP error message A155 indicates that a deletion object is currently being processed in parallel, which means that there is a conflict due to concurrent operations trying to delete or modify the same data. This can occur in various scenarios, such as when multiple users or processes attempt to delete records from the same table simultaneously.
  Cause:
  
  Concurrent Deletion Attempts: Multiple users or background jobs are trying to delete the same object at the same time.
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If one process has locked the object for deletion, other processes will be blocked until the lock is released.
  Long-Running Transactions: If a transaction takes a long time to complete, it can hold locks longer than expected, causing other transactions to wait.
  
  Solution:
  
  Wait and Retry: If the error is due to a temporary lock, waiting for a few moments and then retrying the operation may resolve the issue.
  Check for Active Sessions: Use transaction codes like SM12 (to check for locks) and SM21 (to check the system log) to identify if there are any active sessions that are holding locks on the deletion object.
  Identify and Terminate Conflicting Processes: If you find that a specific process is holding the lock for an extended period, you may need to investigate that process. If necessary, you can terminate it using transaction SM37 (for job monitoring) or SM50 (for process monitoring).
  Batch Processing: If the deletion is part of a batch job, consider scheduling it during off-peak hours to minimize the chances of concurrent access.
  Review Custom Code: If the deletion is triggered by custom code, review the logic to ensure that it handles locking appropriately and does not lead to unnecessary conflicts.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage locks.
  SM21: System log.
  SM37: Job monitoring.
  SM50: Process overview.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation on data deletion and locking mechanisms for a deeper understanding of how SAP handles concurrent operations.
  
  By following these steps, you should be able to resolve the A155 error and understand the underlying issues related to concurrent processing in SAP.