How To Fix WM751 - One or more materials locked

SAP Error Message - Details

• Message type: E = Error

• Message class: WM - IS-R Assortments

• Message number: 751

• Message text: One or more materials locked

What causes this issue?

One or more of the materials you wish to use in this function are
currently blocked by other functions.
Example:
You wish to edit an assortment module, but the materials it contains
are either blocked in material master maintenance or are also contained
in another module that is currently being edited.

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?

Repeat the function later or cancel it.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WM751 - One or more materials locked ?

  The SAP error message WM751 ("One or more materials locked") typically occurs in the Warehouse Management (WM) module when you attempt to perform a transaction involving materials that are currently locked. This can happen for various reasons, such as ongoing transactions, inventory management processes, or other users accessing the same materials.
  Causes:
  
  Ongoing Transactions: Another user or process is currently using the material, which locks it for other operations.
  Inventory Management: The material might be involved in an inventory count or other inventory-related processes.
  Batch Management: If the material is batch-managed, it may be locked due to batch-related transactions.
  Open Purchase Orders: There may be open purchase orders or other documents that are preventing changes to the material.
  User Locks: A user may have manually locked the material for some reason.
  
  Solutions:
  
  Check Lock Entries: Use transaction code SM12 to check for lock entries related to the material. You can identify which user or process is holding the lock.
  Wait and Retry: If the lock is temporary (e.g., due to another user), wait for the other transaction to complete and then retry your operation.
  Release Locks: If you have the necessary authorizations, you can manually release locks in SM12. Be cautious with this approach, as it may disrupt other users.
  Check Inventory Processes: Ensure that there are no ongoing inventory counts or other processes that might be locking the material.
  Consult with Users: If you identify a specific user or process holding the lock, consult with them to understand why the material is locked and if it can be released.
  Review Batch Management: If the material is batch-managed, check if there are any batch-related transactions that need to be completed.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (for lock entries), MB52 (for material list), and MB1A (for goods issues).
  User Authorizations: Ensure that you have the necessary authorizations to view and manage locks.
  Documentation: Refer to SAP documentation or help resources for more detailed information on handling locks in the WM module.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or technical support for further investigation.