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

SAP Error Message - Details

• 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 trying to perform.
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check Item Type: Ensure that the line item you are trying to assign is indeed an alternative line. If it is not, you may need to change the item type or the way you are trying to assign it.
  
  
  Review Document Settings: Look at the configuration of the document you are working with. Ensure that the settings allow for alternative line assignments.
  
  
  Use Alternative Lines: If you need to assign a line, make sure you are working with an alternative line. You may need to create or modify the line item to be an alternative line.
  
  
  Consult Documentation: Review SAP documentation or help resources related to line item processing and alternative items for more specific guidance.
  
  
  Check Customizations: If your SAP system has been customized, there may be specific rules or logic that affect how line assignments are handled. Consult with your SAP technical team or functional consultant.
  
  
  Error Logs: Check the error logs for more detailed information about the context in which the error occurred. This can provide insights into what might be going wrong.
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional context.
  Transaction Codes: Familiarize yourself with transaction codes related to the document type you are working with (e.g., VA01 for sales orders, ME21N for purchase orders).
  User Forums: Consider checking SAP community forums or user groups for discussions related to this error, as other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the cause of the SE357 error and implement a suitable solution. If the problem persists, it may be beneficial to engage with SAP support for further assistance.