How To Fix /SCWM/WHO509 - Assignment of HU &1 not removed, since WTs are packed in it

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/WHO -

• Message number: 509

• Message text: Assignment of HU &1 not removed, since WTs are packed in it

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/WHO509 - Assignment of HU &1 not removed, since WTs are packed in it ?

  The SAP error message /SCWM/WHO509 Assignment of HU &1 not removed, since WTs are packed in it typically occurs in the context of handling units (HUs) in the Extended Warehouse Management (EWM) module. This error indicates that there is an attempt to remove or change the assignment of a handling unit (HU) that is currently being used to pack work tasks (WTs). 
  Cause:
  
  Active Work Tasks: The handling unit (HU) you are trying to modify or remove is still associated with one or more work tasks (WTs) that are currently in a packed state.
  System Constraints: The system prevents the removal of the HU assignment to maintain data integrity and ensure that the work tasks can be processed correctly.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Active Work Tasks: Identify the work tasks that are currently packed in the handling unit. You can do this by using transaction codes like /SCWM/WT to view the work tasks and their statuses.
  
  
  Unpack or Complete Work Tasks: If possible, unpack the handling unit or complete the work tasks that are associated with it. This may involve:
  
  Unpacking the HU if it is not needed anymore.
  Completing or canceling the work tasks that are using the HU.
  
  
  
  Reassign or Change Work Tasks: If the work tasks can be reassigned to another handling unit, do so before attempting to remove the assignment of the original HU.
  
  
  Consult Documentation: Review the SAP documentation or help files related to handling units and work tasks in EWM for more detailed procedures.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert who can provide further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in EWM, such as /SCWM/WHO for handling units and /SCWM/WT for work tasks.
  EWM Configuration: Ensure that your EWM configuration is set up correctly for handling units and work tasks.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that could resolve the issue.
  
  By following these steps, you should be able to address the error message and manage your handling units and work tasks effectively.