How To Fix CMCL108 - An item cannot be assigned to a dummy operation

SAP Error Message - Details

• Message type: E = Error

• Message class: CMCL - Service layer for component allocations

• Message number: 108

• Message text: An item cannot be assigned to a dummy operation

What causes this issue?

You want to assign items to an operation that references a reference
operation set or reference rate routing. This is not possible.

System Response

The component assignment was not created.

How to fix this error?

Assign the items that you want to assign to a reference operation set
(or reference rate routing) to the operations of the reference
operation set (or reference rate routing).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CMCL108 - An item cannot be assigned to a dummy operation ?

  The SAP error message CMCL108 ("An item cannot be assigned to a dummy operation") typically occurs in the context of production planning or process management within SAP. This error indicates that there is an attempt to assign a material or item to a "dummy operation" in a routing or production order, which is not allowed.
  Cause:
  
  Dummy Operation: A dummy operation is a placeholder in a routing that does not perform any actual work. It is often used for organizational purposes or to represent a step that does not require any resources or time.
  Incorrect Assignment: The error arises when there is an attempt to assign a material or component to this dummy operation, which is not valid since dummy operations do not consume materials or have any associated costs.
  
  Solution:
  
  Review the Routing: Check the routing associated with the production order or process. Identify the dummy operation and ensure that no materials are assigned to it.
  Reassign Materials: If materials are incorrectly assigned to the dummy operation, reassign them to the appropriate operations that actually perform work and consume materials.
  Modify the Dummy Operation: If the dummy operation is necessary for your process, ensure that it is correctly configured and that no materials are linked to it.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on how to manage routings and operations effectively.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CA01 (Create Routing), CA02 (Change Routing), or CO01 (Create Production Order) to review and modify routings and production orders.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  User Roles: Ensure that you have the appropriate permissions to make changes to routings and production orders in SAP.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in production planning.