How To Fix MAHD603 - AHD for material &1 and MRP area &2 is locked by user &3

MAHD603 - Overview

• Message type: E = Error

• Message class: MAHD - Messages for Alternative Historical Data

• Message number: 603

• Message text: AHD for material &1 and MRP area &2 is locked by user &3

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MAHD603 - AHD for material &1 and MRP area &2 is locked by user &3 ?

  The SAP error message MAHD603 indicates that a specific material in a particular MRP (Material Requirements Planning) area is locked by a user. This typically occurs when a user is performing an operation that requires exclusive access to the material or MRP area, such as running a planning run or making changes to the material master data.
  
  Cause:
  
  User Lock: The material is currently being accessed or modified by another user, which prevents other users from making changes or running processes that involve that material.
  Long-running Transactions: If a user has a long-running transaction that locks the material, it can lead to this error for other users trying to access the same material.
  System Issues: Occasionally, system issues or bugs can lead to locks not being released properly.
  
  
  Solution:
  
  Identify the Locking User: Check who is currently locking the material. You can use transaction code SM12 to view the lock entries and identify the user who