How To Fix CP433 - Warning: The reference operation set is already in use.

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 433

• Message text: Warning: The reference operation set is already in use.

What causes this issue?

You are attempting to change a reference operation set that is
referenced in other task lists. These task lists will also be changed
if you make changes to this reference operation set.

How to fix this error?

Check what effect changes to the reference operation set will have on
the referenced task lists. Use the where-used report for task lists.
In routings, select the menu options <LS>Reporting -> Where-used ->
Ref. operation sets</>.
<DS:TRAN.CA90>Execute where-used list</>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CP433 - Warning: The reference operation set is already in use. ?

  The SAP error message CP433, which states "Warning: The reference operation set is already in use," typically occurs in the context of production planning and control, particularly when dealing with routing and operation sets in SAP's PP (Production Planning) module.
  Cause:
  This warning indicates that the reference operation set you are trying to use is already assigned to another production order or routing. In SAP, a reference operation set is a collection of operations that can be reused across different production processes. When you attempt to assign a reference operation set that is already in use, SAP generates this warning to inform you that the operation set is not available for the new assignment.
  Solution:
  
  
  Check Usage: First, check where the reference operation set is currently being used. You can do this by navigating to the relevant transaction codes (like CA03 for displaying routing) and checking the assignments.
  
  
  Modify or Create a New Set: If the reference operation set is indeed in use and you need to make changes, consider creating a new reference operation set or modifying the existing one if it is appropriate to do so.
  
  
  Review Production Orders: If the reference operation set is tied to a specific production order, you may need to review the production orders that are currently using it. If possible, you can complete or close those orders before reassigning the operation set.
  
  
  Consult Documentation: Review SAP documentation or help files related to reference operation sets and production orders for more detailed guidance on managing these sets.
  
  
  Seek Help from SAP Support: If the issue persists or if you are unsure about the implications of changing the reference operation set, consider reaching out to your SAP support team or consulting with SAP experts.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CA03 (Display Routing), CA02 (Change Routing), and CO01 (Create Production Order) to manage and view routing and operation sets.
  SAP Notes: Check SAP Notes for any known issues or updates related to this warning message.
  Training and Documentation: Ensure that users involved in production planning are trained on how to manage reference operation sets effectively to avoid conflicts.
  
  By following these steps, you should be able to address the CP433 warning and manage your reference operation sets more effectively in SAP.