How To Fix AQ322 - The cursor must be on a line in the 'Line structure' area

AQ322 - Overview

• Message type: E = Error

• Message class: AQ - Message texts for SAP Query

• Message number: 322

• Message text: The cursor must be on a line in the 'Line structure' area

What causes this issue?

You attempted to generate column headers for the fields of a line in
your list. To do this, you need to place the cursor on the appropriate
line in the <LS>Line structure</> area.

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?

Error message extract from SAP system. Copyright SAP SE.

AQ322 - Details

• The SAP error message AQ322, which states "The cursor must be on a line in the 'Line structure' area," typically occurs when a user attempts to perform an action that requires the cursor to be positioned on a specific line in a table or list structure within an SAP transaction. This error is common in transactions that involve line item processing, such as creating or editing purchase orders, sales orders, or other documents that have line item details.
  
  Cause:
  The error is caused by the following scenarios:
  
  Cursor Position: The cursor is not positioned on a valid line item in the line structure area of the screen. This can happen if the user clicks outside the line item area or if there are no line items displayed.
  Empty Line Structure: The line structure area may be empty, meaning there are no line items to select or edit.
  Incorrect Navigation: The user may have navigated away