How To Fix /SCWM/RF_DE237 - HU &1 is being processed in parallel; No access possible

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/RF_DE -

• Message number: 237

• Message text: HU &1 is being processed in parallel; No access possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/RF_DE237 - HU &1 is being processed in parallel; No access possible ?

  The SAP error message /SCWM/RF_DE237 HU &1 is being processed in parallel; No access possible typically occurs in the context of handling Handling Units (HUs) in the SAP Extended Warehouse Management (EWM) system. This error indicates that the specified Handling Unit (HU) is currently being processed by another transaction or user, which prevents your transaction from accessing it.
  Cause:
  
  Concurrent Processing: The most common cause of this error is that the Handling Unit is being processed in another session or by another user. This can happen if multiple users are trying to perform operations on the same HU simultaneously.
  Long-running Transactions: If a transaction takes a long time to complete, it can lock the HU, leading to this error for other users trying to access it.
  System Configuration: There may be specific configurations or settings in the EWM system that dictate how HUs are locked during processing.
  
  Solution:
  
  Wait and Retry: If you encounter this error, the simplest solution is to wait for a few moments and then try to access the HU again. This allows the other transaction to complete.
  Identify the Lock: If the issue persists, you may need to identify which user or transaction is currently processing the HU. You can use transaction codes like SM12 (to check for locks) or SM21 (to check system logs) to find out more about the lock situation.
  Contact the User: If you identify another user or transaction that is holding the lock, you can contact them to see if they can release the HU or complete their transaction.
  System Administration: If necessary, a system administrator can forcibly release the lock using transaction SM12, but this should be done with caution as it may lead to data inconsistencies.
  Review Configuration: If this error occurs frequently, it may be worth reviewing the system configuration and settings related to HU processing to ensure they are optimized for your business processes.
  
  Related Information:
  
  Handling Units (HUs): In SAP EWM, HUs are used to manage and track physical items in the warehouse. They can represent single items or multiple items packed together.
  Lock Management: SAP uses a locking mechanism to prevent data inconsistencies when multiple users are trying to access the same data simultaneously. Understanding how locks work in SAP can help in troubleshooting similar issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 for lock entries, SM21 for system logs, and SE11 for data dictionary to understand the underlying data structures.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP support team or refer to SAP Notes for more specific guidance related to your system version and configuration.