How To Fix AG603 - Planning material & is locked (assignment check not possible)

SAP Error Message - Details

• Message type: E = Error

• Message class: AG - Nachrichten ATP-Server

• Message number: 603

• Message text: Planning material & is locked (assignment check not possible)

What causes this issue?

<GL:planning_material>Planning material</> &V1& (plant &V2&), which
belongs to material &V4&, the material that you are processing, has
been locked by user &V3&. The system has unsuccessfully attempted to
lock this material.

System Response

To avoid further delaying your work, the system will terminate its
attempts to lock the material and will not execute an assignment check.

How to fix this error?

Note that the operation you are processing has not been confirmed.
Therefore, you should execute an assignment check
<DS:GLOS.availability_check>(availability check)</> again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AG603 - Planning material & is locked (assignment check not possible) ?

  The SAP error message AG603 ("Planning material & is locked (assignment check not possible)") typically occurs in the context of production planning or material requirements planning (MRP) when a material is locked for planning purposes. This can happen for various reasons, such as the material being in use in another process, being locked by a user, or being part of a transaction that is currently being processed.
  Causes:
  
  Material Locking: The material is locked by another user or process, preventing any changes or planning activities.
  Transaction in Progress: A transaction involving the material is currently being processed, which locks the material for planning.
  User Lock: A user has manually locked the material for some reason, such as maintenance or updates.
  Configuration Issues: There may be configuration settings in the system that are causing the material to be locked.
  
  Solutions:
  
  
  Check Lock Status:
  
  Use transaction code SM12 to check for any locks on the material. You can filter by the material number to see if there are any active locks and who has locked it.
  If you find a lock that is no longer needed, you can delete it (if you have the necessary authorizations).
  
  
  
  Identify the Process:
  
  Determine if there is an ongoing process that is using the material. This could be a production order, purchase order, or any other transaction that might be locking the material.
  If a process is using the material, you may need to wait until it is completed or resolved.
  
  
  
  User Communication:
  
  If the lock is due to another user, communicate with them to understand why the material is locked and if they can release it.
  
  
  
  Check Configuration:
  
  Review the configuration settings related to material planning to ensure that there are no settings that are causing unnecessary locks.
  
  
  
  System Restart:
  
  In some cases, a system restart or a refresh of the session may help clear temporary locks.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or support for specific guidance related to your version of SAP and the context in which the error occurs.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MD04 (Stock/Requirements List), MD02 (MRP Run), and SM12 (Display and Delete Locks).
  User Authorizations: Ensure that you have the necessary authorizations to view and manage locks in the system.
  SAP Notes: Check for any SAP Notes related to this error message for additional troubleshooting steps or patches that may resolve the issue.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis or technical support team for further investigation.