How To Fix BOM601 - Assembly for material &1 and sales order &2 &3 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: BOM - BOMs (2)

• Message number: 601

• Message text: Assembly for material &1 and sales order &2 &3 already exists

What causes this issue?

You want to copy a multi-level BOM from one sales order to another.
However, one of the order BOMs in the multi-level BOM is already a
detached order assembly in the target order.

System Response

The system does not copy any BOM.

How to fix this error?

Check whether the detached order assembly in the target order is still
required and delete it if not. Then repeat the operation.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BOM601 - Assembly for material &1 and sales order &2 &3 already exists ?

  The SAP error message BOM601 indicates that there is an attempt to create a Bill of Materials (BOM) for a specific assembly (material) and sales order that already has an existing BOM. This error typically arises in the context of production planning and sales order management when the system detects that a BOM for the specified assembly and sales order combination already exists in the database.
  Cause:
  
  Duplicate BOM Entry: The most common cause is that a BOM for the specified material and sales order has already been created. This can happen if the user attempts to create a BOM without checking for existing entries.
  Incorrect Data Entry: There may be a mistake in the data entry, such as using the wrong sales order number or material number.
  System Configuration: In some cases, the system configuration may allow for certain combinations that lead to this error.
  
  Solution:
  
  Check Existing BOMs: Before creating a new BOM, check if a BOM already exists for the specified material and sales order. You can do this by using transaction codes like CS03 (Display BOM) or CS02 (Change BOM) to view existing BOMs.
  Use Existing BOM: If a BOM already exists, consider using it instead of creating a new one. You can modify the existing BOM if necessary.
  Correct Data Entry: Ensure that the material number and sales order number you are using are correct. Double-check for typos or incorrect entries.
  Consult Documentation: Review the SAP documentation or help files related to BOM management to understand the specific requirements and constraints for creating BOMs.
  System Configuration Review: If you believe the error is due to system configuration, consult with your SAP administrator or technical team to review the settings related to BOM creation.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CS01 (Create BOM), CS02 (Change BOM), and CS03 (Display BOM).
  BOM Types: Understand the different types of BOMs (e.g., production BOM, sales order BOM) and their specific use cases.
  SAP Notes: Check for any SAP Notes related to BOM management that may provide additional insights or solutions to known issues.
  User Authorization: Ensure that you have the necessary authorizations to create or modify BOMs in the system.
  
  By following these steps, you should be able to resolve the BOM601 error and successfully manage your BOMs in SAP.