How To Fix /SCWM/UI_PACKING155 - HU is being put away; completion not possible

/SCWM/UI_PACKING155 - Overview

• Message type: E = Error

• Message class: /SCWM/UI_PACKING -

• Message number: 155

• Message text: HU is being put away; completion not possible

Self-Explanatory Message

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/SCWM/UI_PACKING155 - Details

• The SAP error message /SCWM/UI_PACKING155 indicates that a Handling Unit (HU) is currently in the process of being put away, and therefore, the completion of the packing process cannot be performed. This situation typically arises in the context of warehouse management within SAP Extended Warehouse Management (EWM).
  
  Cause:
  
  Ongoing Putaway Process: The most common cause of this error is that the Handling Unit is already in the process of being put away to a storage location. This means that the system has locked the HU for this operation, preventing any other actions (like completing packing) from being performed on it.
  System Locking Mechanism: SAP uses locking mechanisms to ensure data integrity during warehouse operations. If an HU is locked for putaway, it cannot be modified or completed until the putaway process is finished.
  Incorrect Workflow: The error may also occur if the workflow for handling units is not followed correctly, leading to conflicts in