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

MM637 - Overview

• 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.

MM637 - Details

• 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: