How To Fix /SCWM/RF_EN420 - Handling unit &1 already exists in the warehouse

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/RF_EN -

• Message number: 420

• Message text: Handling unit &1 already exists in the warehouse

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/RF_EN420 - Handling unit &1 already exists in the warehouse ?

  The SAP error message /SCWM/RF_EN420 Handling unit &1 already exists in the warehouse typically occurs in the context of SAP Extended Warehouse Management (EWM) when you are trying to create or process a handling unit (HU) that already exists in the system. This can happen during various operations, such as receiving goods, transferring stock, or performing inventory counts.
  
  Cause:
  
  
  Duplicate Handling Unit: The handling unit you are trying to create or process already exists in the warehouse. This could be due to:
  
  An attempt to create a new handling unit with the same identifier as an existing one.
  A previous operation that did not complete successfully, leaving the handling unit in an inconsistent state.
  Manual entry errors where the same HU number is reused.
  
  
  
  System Configuration: There may be configuration settings in the system that enforce unique handling unit identifiers, leading to this error when duplicates are detected.
  
  
  
  Solution:
  
  
  Check Existing Handling Units: 
  
  Use transaction codes like /SCWM/HU