How To Fix L3789 - No HU pick. Source handling unit must not be specified

SAP Error Message - Details

• Message type: E = Error

• Message class: L3 -

• Message number: 789

• Message text: No HU pick. Source handling unit must not be specified

What causes this issue?

Although the withdrawal does not result from a handling unit for TO
items &V1& &V2&, a handling unit was entered.

System Response

Confirmation of the TO items is rejected by the system.

How to fix this error?

A handling unit must not be entered for confirmation of this TO item.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message L3789 - No HU pick. Source handling unit must not be specified ?

  The SAP error message L3789 ("No HU pick. Source handling unit must not be specified") typically occurs in the context of handling units (HUs) during warehouse operations, particularly when trying to perform picking tasks. This error indicates that the system is expecting a picking operation that does not involve a specific handling unit, but one has been specified.
  Cause:
  
  Handling Unit Specification: The error arises when a handling unit is specified in a picking operation where the system does not expect it. This can happen if the picking process is set up to pick items directly from storage locations rather than from specific handling units.
  Configuration Issues: There may be configuration settings in the warehouse management module that dictate how picking should be handled, and these settings may not align with the current operation.
  Incorrect Document Type: The document type being used for the picking operation may not support handling units, leading to this error.
  
  Solution:
  
  Check Picking Strategy: Review the picking strategy configured for the warehouse. Ensure that it allows for picking from handling units if that is the intended operation.
  Remove Handling Unit Specification: If the operation does not require a handling unit, ensure that the handling unit field is left blank when initiating the picking process.
  Review Configuration: Check the configuration settings in the Warehouse Management (WM) module to ensure that they are set up correctly for handling units. This includes checking the settings for the relevant storage types and picking areas.
  Use Correct Document Type: Ensure that the correct document type is being used for the picking operation. If handling units are required, use a document type that supports them.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling units and picking processes in your version of SAP.
  
  Related Information:
  
  Handling Units (HUs): In SAP, handling units are used to manage and track inventory at a more granular level. They can represent pallets, boxes, or any other packaging unit.
  Warehouse Management (WM): This module in SAP is responsible for managing warehouse operations, including inventory management, picking, and shipping.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LT03 (Transfer Order Creation), LT12 (Confirm Transfer Order), and others that may be involved in the picking process.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that address known issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a technical consultant who can analyze the specific configuration and operational context of your SAP system.