How To Fix WRF_APC302 - Cannot make changes to material &1

WRF_APC302 - Overview

• Message type: E = Error

• Message class: WRF_APC - Messages for Operational Assortment Planning and Control

• Message number: 302

• Message text: Cannot make changes to material &1

What causes this issue?

The target material &V1& is locked by another user and cannot be
changed by the copy process.

System Response

The following options could not be selected:
Copy Characteristic Values
Copy Prepacks
Copy Prepack Assignment
Copy Variant Assignment

How to fix this error?

Change the copy options.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

WRF_APC302 - Details

• SAP Error Message:
  WRF_APC302: Cannot make changes to material &1
  
  
  Cause:
  This error typically occurs when you try to make changes to a material master record that is currently locked or controlled by a process that restricts modifications. Common reasons include:
  
  The material is locked due to an ongoing background job or process (e.g., a mass update, data transfer, or integration process).
  The material is part of a controlled environment where changes are restricted (e.g., during a production run, planning run, or when the material is flagged as locked in the system).
  The material is under change lock due to workflow or approval processes.
  The material is being processed in Advanced Planning and Optimization (APO) or another SCM component, which restricts direct changes in ECC.
  
  
  
  Solution:
  
  
  Check Lock Status:
  
  Use transaction SM12 to check if there is a lock entry for the material. If a lock exists, determine if it is safe to delete the lock or wait for the