How To Fix CP518 - Operation number &/&/&/& is not unique

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 518

• Message text: Operation number &/&/&/& is not unique

What causes this issue?

The operation &V4& in sequence &V3& of group &V1&, group counter &V2&
is not unique. Processing is only possible if all operations in a
sequence have unique numbers.

How to fix this error?

Please correct the operation numbers.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CP518 - Operation number &/&/&/& is not unique ?

  The SAP error message CP518 indicates that there is a problem with the operation number in a production order or routing. Specifically, it means that the operation number you are trying to use is not unique within the context of the order or routing. This can occur in various scenarios, such as when you are trying to create or modify a production order, routing, or work center.
  Cause:
  
  Duplicate Operation Numbers: The operation number you are trying to enter already exists in the same routing or production order.
  Incorrect Configuration: There may be an issue with how the routing or production order is configured, leading to conflicts in operation numbers.
  Data Entry Error: A simple typographical error may have led to the entry of a duplicate operation number.
  
  Solution:
  
  Check Existing Operations: Review the existing operations in the routing or production order to identify any duplicates. You can do this by navigating to the routing or production order in SAP and checking the operation list.
  Modify Operation Numbers: If you find duplicate operation numbers, you can either change the operation number of the new entry or modify the existing one to ensure uniqueness.
  Review Routing Configuration: Ensure that the routing is correctly configured and that there are no unintended duplicates in the operation numbers.
  Use Unique Identifiers: When creating new operations, always ensure that the operation numbers are unique within the context of the routing or production order.
  Consult Documentation: If you are unsure about the correct operation numbers or how to configure them, refer to SAP documentation or consult with a colleague who has experience with SAP production planning.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CA01 (Create Routing), CA02 (Change Routing), or CO01 (Create Production Order) to access the relevant screens.
  SAP Notes: Check for any SAP Notes related to this error message for additional guidance or patches that may address the issue.
  User Authorization: Ensure that you have the necessary authorizations to make changes to routings or production orders, as lack of permissions can sometimes lead to unexpected errors.
  
  By following these steps, you should be able to resolve the CP518 error and ensure that your operation numbers are unique within the SAP system.