How To Fix CX311 - An order BOM already exists for item &

SAP Error Message - Details

• Message type: E = Error

• Message class: CX - Nachrichten für Konfigurationsprozess

• Message number: 311

• Message text: An order BOM already exists for item &

What causes this issue?

An order BOM already exists for the changed order item. Changes to the
assigned characteristic values for this item do not affect the existing
order BOM.

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?

Call the multilevel processing function for order BOMs for this order
item. To do this, from the SAP Easy Access Menn choose <(>
<<)>LS>Logistics -> Production -> Master Data -> Bills of Material ->
Bill of Material - > Order BOM -> Maintain Multilevel<(><<)>/>. Check
the result, and save the order BOM. The system updates the result to
match the changed data in the order item.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CX311 - An order BOM already exists for item & ?

  The SAP error message CX311 indicates that there is an attempt to create a Bill of Materials (BOM) for an order item that already has an existing BOM. This error typically occurs in the context of production planning and material management when trying to create or modify BOMs for production orders.
  Cause:
  
  Existing BOM: The primary cause of this error is that a BOM already exists for the specified order item. SAP does not allow the creation of multiple BOMs for the same item in the same context.
  Incorrect Data Entry: There may be a mistake in the data entry, such as trying to create a BOM for an item that is already linked to another BOM.
  System Configuration: There might be configuration settings in the SAP system that prevent the creation of multiple BOMs for the same item.
  
  Solution:
  
  Check Existing BOMs: Verify if a BOM already exists for the specified item. You can do this by using transaction codes like CS03 (Display BOM) to check the existing BOMs for the item in question.
  Modify Existing BOM: If a BOM already exists and you need to make changes, consider modifying the existing BOM instead of creating a new one. Use transaction CS02 (Change BOM) to make necessary adjustments.
  Delete Existing BOM: If the existing BOM is no longer needed, you can delete it using transaction CS02, but be cautious as this may affect production orders that rely on that BOM.
  Consult Documentation: Review the SAP documentation or help files for more information on BOM management and the specific error message.
  Check User Permissions: Ensure that you have the necessary permissions to create or modify BOMs in the system.
  
  Related Information:
  
  Transaction Codes:
  
  CS01: Create BOM
  CS02: Change BOM
  CS03: Display BOM
  
  
  BOM Types: Understand the different types of BOMs (e.g., production BOM, sales BOM) and their specific use cases.
  SAP Notes: Check SAP Notes for any known issues or patches related to BOM management that might address this error.
  User Roles: Ensure that the user role has the appropriate authorizations to create or modify BOMs.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in SAP production planning and BOM management.