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