How To Fix KOSA401 - BOM and routing cannot be changed. See long text

SAP Error Message - Details

• Message type: E = Error

• Message class: KOSA - Product Cost Collector

• Message number: 401

• Message text: BOM and routing cannot be changed. See long text

What causes this issue?

You are attempting to change the entries for the BOM or for detailed or
rate-based planning in production version &V1& of material &V2& in
plant &V3&. Because the
<DS:GLOS.36F138F91B385A9EE10000009B38F984>controlling level</>
<ZK>BOM/Routing</> is assigned to material &V2& in plant &V3&, and
because production version &V1& is used in repetitive manufacturing,
changing the entries for the BOM or for detailed or rate-based planning
would result in the use of the wrong product cost collector in
repetitive manufacturing for production version &V1&. For this reason,
it is not permissible to change entries for the BOM or for detailed or
rate-based planning in production version &V1&.

System Response

The system does not allow any changes.

How to fix this error?

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

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 KOSA401 - BOM and routing cannot be changed. See long text ?

  The SAP error message KOSA401 indicates that a Bill of Materials (BOM) and routing cannot be changed for a particular production order or process order. This error typically arises in the context of production planning and execution within SAP, particularly when trying to modify existing BOMs or routings that are already assigned to production orders.
  Causes of KOSA401
  
  
  Order Status: The production order or process order may be in a status that does not allow changes. For example, if the order is already released, confirmed, or completed, modifications to the BOM or routing may be restricted.
  
  
  BOM/Routing Lock: The BOM or routing may be locked for changes due to various reasons, such as being in use by another order or being marked as "not changeable."
  
  
  Authorization Issues: The user may not have the necessary authorizations to make changes to the BOM or routing.
  
  
  Configuration Settings: Certain configuration settings in the system may prevent changes to BOMs or routings once they are assigned to an order.
  
  
  Solutions to KOSA401
  
  
  Check Order Status: Verify the status of the production or process order. If it is in a status that does not allow changes (e.g., "TECO" - Technically Completed), you may need to change the status back to a modifiable state or create a new order.
  
  
  Unlock BOM/Routing: If the BOM or routing is locked, check if it can be unlocked. This may involve checking for other orders using the same BOM or routing or consulting with a system administrator.
  
  
  Authorization Check: Ensure that the user attempting to make the changes has the necessary authorizations. This may involve checking user roles and permissions in the SAP system.
  
  
  Consult Documentation: Review the long text associated with the error message for specific details on why the change is not allowed. This can provide insights into the exact restrictions in place.
  
  
  Create a New BOM/Routing: If changes are not possible, consider creating a new BOM or routing version and assigning it to a new production order.
  
  
  Consult with SAP Support: If the issue persists and cannot be resolved through the above steps, it may be necessary to consult with SAP support or your internal SAP team for further assistance.
  
  
  Related Information
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CS02 (Change BOM), CA02 (Change Routing), and CO02 (Change Production Order) to navigate the system effectively.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional context or solutions.
  Documentation: Review SAP documentation or user manuals related to production order management, BOMs, and routings for best practices and guidelines.
  
  By following these steps, you should be able to diagnose and address the KOSA401 error effectively.