How To Fix SE357 - Line assignment only allowed in case of alternative line

SE357 - Overview

• Message type: E = Error

• Message class: SE - Dienstleistungen Stammdaten Leistungsposition

• Message number: 357

• Message text: Line assignment only allowed in case of alternative line

What causes this issue?

You have entered a line in the field "To line", although the current
line is not an alternative to a basic line.

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?

Mark the line as an alternative line and then enter the number of the
basic line to which the alternative relates.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SE357 - Line assignment only allowed in case of alternative line ?

  The SAP error message SE357, which states "Line assignment only allowed in case of alternative line," typically occurs in the context of line item processing in SAP, particularly when dealing with alternative items in a sales order, purchase order, or similar document.
  
  Cause:
  This error usually arises when you attempt to assign a line item in a way that is not permitted by the system's logic. Specifically, it indicates that the line assignment you are trying to perform is only valid for alternative lines. Alternative lines are typically used in scenarios where multiple options for a product or service are available, and the system expects a specific handling of these lines.
  Common Scenarios:
  
  Sales Orders: When trying to assign a line item to a non-alternative line.
  Purchase Orders: Similar issues can occur when dealing with alternative items in procurement documents.
  Item Categories: The item category settings may not allow for the type of assignment you are