How To Fix ATP_RELFORDEL201 - Parallel sales order update is already running.

SAP Error Message - Details

• Message type: E = Error

• Message class: ATP_RELFORDEL -

• Message number: 201

• Message text: Parallel sales order update is already running.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ATP_RELFORDEL201 - Parallel sales order update is already running. ?

  The SAP error message ATP_RELFORDEL201, which states "Parallel sales order update is already running," typically occurs in the context of Advanced ATP (Available-to-Promise) checks when multiple processes are trying to update sales orders simultaneously. This can happen in high-volume environments where multiple users or processes are attempting to modify or create sales orders at the same time.
  Cause:
  
  Concurrent Processing: The error is primarily caused by concurrent attempts to update the same sales order or related data. This can happen if multiple users are trying to process sales orders simultaneously.
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. When one process is updating a sales order, other processes trying to access the same order will be blocked until the first process completes.
  Long-running Transactions: If a transaction takes too long to complete, it can lead to other transactions being queued, resulting in this error.
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait for a few moments and then retry the operation. This allows the first process to complete and release the lock.
  Check for Long-running Transactions: Use transaction codes like SM50 or SM66 to monitor active processes and identify any long-running transactions that may be causing the lock.
  Optimize Processes: Review and optimize the processes that are causing the locks. This may involve:
  
  Reducing the number of concurrent updates to the same sales order.
  Implementing better transaction management to minimize the time locks are held.
  
  
  Batch Processing: If applicable, consider using batch processing for sales order updates to reduce the number of concurrent updates.
  System Configuration: Consult with your SAP Basis team to review system configuration and performance tuning, which may help reduce the occurrence of this error.
  Error Handling in Custom Code: If you have custom code that interacts with sales orders, ensure that it includes proper error handling and retry logic to manage this situation gracefully.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error. SAP frequently releases updates that may address known issues.
  Transaction Codes: Familiarize yourself with transaction codes like SM21 (System Log), ST22 (Dump Analysis), and SLG1 (Application Log) to investigate further if the issue persists.
  User Training: Ensure that users are trained on how to handle concurrent updates and the importance of waiting for processes to complete before attempting to make changes.
  
  If the problem continues to occur frequently, it may be beneficial to engage with SAP support for a deeper analysis of the issue.