How To Fix CM021 - Change no. & is not valid for component allocation.

CM021 - Overview

• Message type: E = Error

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

• Message number: 021

• Message text: Change no. & is not valid for component allocation.

What causes this issue?

You want to allocate material components and have entered a change
number. In this case, the change number must be active for the object
type "task list" as well as for the object type "bill of material".
The change number entered is not valid for the object type "bill of
material".

How to fix this error?

Maintain the change number. From the main menu, choose <ZH>Logistics
</> -> <ZH>Central functions</> -> <ZH>Engin. change mgmt.</>.

Error message extract from SAP system. Copyright SAP SE.

CM021 - Details

• The SAP error message CM021, which states "Change no. & is not valid for component allocation," typically occurs in the context of change management and production planning within SAP. This error indicates that the change number you are trying to use is not valid for the component allocation process. Here are some potential causes, solutions, and related information for this error:
  Causes:
  
  Invalid Change Number: The change number you are trying to use may not exist or may not be active.
  Change Number Status: The change number might be in a status that does not allow it to be used for component allocation (e.g., it may be locked or not released).
  Component Allocation Not Allowed: The change number may not be applicable for the specific component or material you are trying to allocate.
  Authorization Issues: The user may not have the necessary authorizations to use the specified change number.
  
  Configuration Issues: There may be configuration settings