How To Fix MM637 - The material &1 cannot be unlocked

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 637

• Message text: The material &1 cannot be unlocked

What causes this issue?

The material &V1& cannot be unlocked because the
material is used in &V2&. For the precise cause, see &V3& in the
following list:
The material is used in a configuration folder.
The material is used in a baseline.
The material is used in a configuration definition.
The material is used as a controlled object.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM637 - The material &1 cannot be unlocked ?

  The SAP error message MM637 indicates that a specific material (denoted by &1) cannot be unlocked. This error typically occurs in the Materials Management (MM) module when there are issues related to the material's status or when it is being used in a way that prevents it from being unlocked.
  Causes:
  
  Material Status: The material may be set to a status that prevents it from being unlocked, such as being marked as "blocked" or "inactive."
  Open Purchase Orders: There may be open purchase orders or other transactions that are still referencing the material, preventing it from being unlocked.
  Stock in Transit: If there is stock in transit or stock that is not yet fully received, the material may be locked.
  User Authorizations: The user attempting to unlock the material may not have the necessary authorizations to perform this action.
  System Lock: The material may be locked by another user or process in the system.
  
  Solutions:
  
  Check Material Status: Review the material's status in the system. If it is blocked or inactive, you may need to change its status to active.
  Review Open Transactions: Check for any open purchase orders, sales orders, or other transactions that reference the material. Resolve these transactions if necessary.
  Check Stock Levels: Ensure that there is no stock in transit or any other stock-related issues that might be causing the lock.
  User Authorizations: Verify that the user has the necessary permissions to unlock the material. If not, contact your SAP administrator to adjust the authorizations.
  Consult with Other Users: If the material is locked by another user, communicate with them to determine if they can release the lock.
  Use Transaction Codes: You can use transaction codes like MM02 (Change Material) to check the material's status and make necessary changes.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) to manage materials effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Refer to SAP documentation for detailed information on material management and error handling.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or refer to SAP's official support channels for further assistance.