How To Fix CM028 - Alls selected components are already assigned to an operation

SAP Error Message - Details

• Message type: E = Error

• Message class: CM - Task list messages: Material component allocations

• Message number: 028

• Message text: Alls selected components are already assigned to an operation

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CM028 - Alls selected components are already assigned to an operation ?

  The SAP error message CM028 ("All selected components are already assigned to an operation") typically occurs in the context of production planning and control, particularly when working with production orders or operations in a routing. This error indicates that the components you are trying to assign to a specific operation in a production order are already assigned to that operation, and therefore cannot be assigned again.
  Cause:
  
  Duplicate Assignment: The components you are trying to assign are already linked to the operation in question.
  Incorrect Selection: You may have selected components that are already assigned, either by mistake or due to a misunderstanding of the current assignments.
  System Configuration: There may be settings in the system that prevent reassigning components that are already linked to an operation.
  
  Solution:
  
  Check Current Assignments: Review the operation in the production order to see which components are already assigned. You can do this by navigating to the production order and checking the components assigned to the specific operation.
  Remove Existing Assignments: If you need to reassign components, you may need to first remove the existing assignments before adding new ones.
  Use Different Components: If the components are already assigned and cannot be removed, consider using different components that are not currently assigned to the operation.
  Review Routing and BOM: Ensure that the Bill of Materials (BOM) and routing are correctly set up and that there are no discrepancies that could lead to confusion regarding component assignments.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing component assignments in your version of SAP.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CO02 (Change Production Order) or CO03 (Display Production Order) to manage production orders effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Roles and Permissions: Ensure that you have the necessary permissions to make changes to component assignments in production orders.
  Training and Support: If you are frequently encountering this error, consider seeking additional training or support from your SAP administrator or a consultant.
  
  By following these steps, you should be able to resolve the CM028 error and manage component assignments effectively in your SAP environment.