How To Fix L3644 - Pick-HU &1 is already assigned to TO &2 and delivery &3

SAP Error Message - Details

• Message type: E = Error

• Message class: L3 -

• Message number: 644

• Message text: Pick-HU &1 is already assigned to TO &2 and delivery &3

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message L3644 - Pick-HU &1 is already assigned to TO &2 and delivery &3 ?

  The SAP error message L3644 indicates that a Handling Unit (HU) is already assigned to a Transfer Order (TO) and a delivery. This typically occurs in the context of warehouse management and logistics processes where handling units are used to manage inventory and shipments.
  Cause:
  The error arises when you attempt to assign a handling unit (HU) that is already linked to a specific transfer order (TO) and delivery. This can happen due to several reasons:
  
  Duplicate Assignment: The same HU is being processed for multiple transfer orders or deliveries.
  System Configuration: There may be issues with the configuration of the warehouse management system that allows for incorrect assignments.
  User Error: A user may inadvertently try to assign an HU that is already in use.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Current Assignments:
  
  Use transaction codes like HU02 (Display Handling Unit) to check the current status and assignments of the handling unit in question.
  Verify which transfer order and delivery the HU is currently assigned to.
  
  
  
  Reassign or Unassign:
  
  If the HU needs to be reassigned, you may need to unassign it from the current TO and delivery first. This can be done using transaction codes like LT03 (Create Transfer Order) or LT12 (Confirm Transfer Order) depending on your process.
  Ensure that the HU is not in use before attempting to reassign it.
  
  
  
  Review Process Flow:
  
  Ensure that the process flow for handling units and transfer orders is being followed correctly. This includes checking for any open transfer orders that may be causing conflicts.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or consult with your SAP support team for specific configurations or settings that may need adjustment.
  
  
  
  Error Logs:
  
  Check the system logs for any additional error messages or warnings that may provide more context about the issue.
  
  
  
  Related Information:
  
  Handling Units (HUs): These are used in SAP to manage physical items in logistics. They can represent pallets, boxes, or any other packaging unit.
  Transfer Orders (TOs): These are used in warehouse management to manage the movement of goods within the warehouse.
  Delivery: This refers to the process of shipping goods to customers or other locations.
  
  If the issue persists after following these steps, it may be necessary to involve your SAP technical team or consult SAP support for further assistance.