How To Fix MM648 - The material cannot be locked when you create it with a reference

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 648

• Message text: The material cannot be locked when you create it with a reference

What causes this issue?

You are creating a material using a reference material, and want to
lock the material you are creating. This is not possible.

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?

Finish creating the material and save it.
Access the transaction <LS>Change Material</> and lock the material
there.

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 MM648 - The material cannot be locked when you create it with a reference ?

  The SAP error message MM648 ("The material cannot be locked when you create it with a reference") typically occurs when you are trying to create a new material using an existing material as a reference, but the system is unable to lock the reference material for some reason. This can happen due to various reasons, including:
  Causes:
  
  Material Locking: The reference material might be locked by another user or process. This can happen if someone else is currently editing the material or if there is a background job that is processing the material.
  Authorization Issues: The user may not have the necessary authorizations to access or lock the reference material.
  System Configuration: There may be configuration settings in the SAP system that prevent locking of materials under certain conditions.
  Database Issues: There could be database-related issues that are preventing the locking mechanism from functioning properly.
  
  Solutions:
  
  Check Material Lock: Verify if the reference material is currently being used or edited by another user. You can use transaction code SM12 to check for locks on the material.
  Wait and Retry: If the material is locked by another user, wait for them to finish and then try creating the new material again.
  Check Authorizations: Ensure that you have the necessary authorizations to create materials and access the reference material. You may need to contact your SAP security team if you suspect authorization issues.
  Use a Different Reference: If possible, try using a different reference material that is not locked.
  System Configuration Review: Consult with your SAP Basis or configuration team to review any settings that might be affecting material locking.
  Database Check: If you suspect a database issue, consult with your database administrator to check for any inconsistencies or issues that might be affecting locking.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and SM12 (Display and Delete Locks).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for MM648 in the SAP Support Portal.
  User Documentation: Review SAP documentation or user manuals related to material management for best practices on creating materials and handling references.
  
  If the issue persists after trying the above solutions, it may be beneficial to escalate the matter to your SAP support team for further investigation.