How To Fix CP407 - Operation number has already been assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: CP - Task list messages: Core data

• Message number: 407

• Message text: Operation number has already been assigned

What causes this issue?

You have chosen an operation number that has already been assigned.

System Response

The reference to the work center operation set could not be created.

How to fix this error?

Choose another operation number.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CP407 - Operation number has already been assigned ?

  The SAP error message CP407, which states "Operation number has already been assigned," typically occurs in the context of production planning and control, particularly when dealing with routing and operations in a production order or a process order. This error indicates that the operation number you are trying to assign or modify has already been used in the system, which can lead to conflicts or inconsistencies in the production data.
  Causes:
  
  Duplicate Operation Assignment: The operation number you are trying to assign is already linked to another operation in the same routing or order.
  Routing Configuration: The routing for the material may already have the operation number defined, and you are attempting to assign it again.
  Data Entry Error: There may be a mistake in data entry where the same operation number is being entered multiple times.
  System Configuration Issues: There could be issues with the configuration of the routing or production order that lead to this error.
  
  Solutions:
  
  Check Existing Operations: Review the routing or production order to see if the operation number is already assigned. You can do this by navigating to the routing or order details in SAP.
  Use Unique Operation Numbers: Ensure that each operation number is unique within the routing or production order. If you need to add a new operation, use a different number.
  Modify Existing Operations: If you need to change an operation, consider modifying the existing operation instead of trying to assign a new one with the same number.
  Review Routing and Order Settings: Check the configuration settings for the routing and production order to ensure they are set up correctly and do not allow duplicate operation numbers.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling routing and operation assignments.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CA03 (Display Routing) or CO02 (Change Production Order) to view and modify routing and production order details.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Authorization: Ensure that you have the necessary authorizations to make changes to the routing or production order, as lack of permissions can sometimes lead to unexpected errors.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in production planning and control.