How To Fix VHUDLV021 - One HU already has a reference to a delivery

VHUDLV021 - Overview

• Message type: E = Error

• Message class: VHUDLV - Messages for Creation of Deliveries via HUs

• Message number: 021

• Message text: One HU already has a reference to a delivery

What causes this issue?

One of the HUs you have selected already has a reference to a delivery.

System Response

Since the HU is already reserved for a delivery, it cannot be included
in a different delivery.

How to fix this error?

If you want to include an HU with a reference to delivery A in delivery
B, you first need to change the reference from A to B by choosing
<zh>Change Reference</>.

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.

VHUDLV021 - Details

• The SAP error message VHUDLV021, which states "One HU already has a reference to a delivery," typically occurs in the context of handling units (HUs) in the SAP system. This error indicates that the handling unit you are trying to reference or assign to a delivery is already linked to another delivery. Here’s a breakdown of the cause, potential solutions, and related information:
  
  Cause:
  
  Existing Reference: The handling unit (HU) you are trying to use is already assigned to a different delivery. In SAP, each HU can only be associated with one delivery at a time.
  Incorrect Processing: The error may arise if there is an attempt to reassign an HU that is still in use or has not been properly processed in the system.
  System Configuration: There may be specific configurations or settings in the system that restrict the movement or assignment of HUs.
  
  Solutions:
  
  
  Check Current Assignments:
  
  Use transaction codes like HU02 (Display Handling Unit)