How To Fix CM018 - The routing is locked by another user (only display).

CM018 - Overview

• Message type: E = Error

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

• Message number: 018

• Message text: The routing is locked by another user (only display).

What causes this issue?

You cannot maintain material component allocations to operations of
this routing because the routing is being processed by another user.
For this reason, the material component allocations are only displayed.

Error message extract from SAP system. Copyright SAP SE.

CM018 - Details

• The SAP error message CM018 indicates that a routing is currently locked by another user, and as a result, you can only view the routing but cannot make any changes. This typically occurs in the context of production planning and control when multiple users are trying to access the same routing data simultaneously.
  
  Cause:
  
  Concurrent Access: Another user is currently editing the routing, which locks the data for other users to prevent conflicting changes.
  Session Timeout: A user may have left a session open, causing the routing to remain locked.
  System Configuration: Certain configurations in the SAP system may lead to prolonged locks on objects.
  
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait until the other user has finished their work and released the lock. You can periodically check back to see if the routing is available for editing.
  Identify the Lock: If you have the necessary authorizations, you can use transaction code SM12 to