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