How To Fix VHUAP201 - Select one header row (sales order, stock tr. order or delivery) only

VHUAP201 - Overview

• Message type: E = Error

• Message class: VHUAP - Messages for Packing Transaction Applications (FGrp VHUDIAL)

• Message number: 201

• Message text: Select one header row (sales order, stock tr. order or delivery) only

What causes this issue?

You want to access the packing transaction, but have either selected
<LS>no</> header line (sales order, stock transport order or delivery)
at all or <LS>several</> header lines.

System Response

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

How to fix this error?

Select a header line (sales order, stock transport order or delivery)
order to access the packing transaction. Handling units which you
selected are ignored in this function.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

VHUAP201 - Details

• SAP Error Message:
  VHUAP201: Select one header row (sales order, stock tr. order or delivery) only
  
  
  Cause:
  This error occurs when you are trying to perform an action (such as creating a billing document, delivery, or other processing) in a transaction that requires exactly one header row to be selected, but either:
  
  No header row is selected, or  
  More than one header row is selected.
  
  In SAP, certain processes require the user to select exactly one header document (e.g., a sales order, stock transport order, or delivery) to proceed. Selecting multiple headers or none violates this requirement, triggering the error.
  
  When does it typically occur?
  
  In transactions related to billing, delivery creation, or order processing where the system expects a single document to be processed at a time.
  For example, in VL01N (Create Outbound Delivery), VF01 (Create Billing Document), or similar transactions where you select documents from a list.
  
  
  
  Solution:
  
  Select exactly one header row before proceeding.  
  If