How To Fix /SCWM/DELIVERY504 - Assignment to transportation unit is locked by user &1

/SCWM/DELIVERY504 - Overview

• Message type: E = Error

• Message class: /SCWM/DELIVERY -

• Message number: 504

• Message text: Assignment to transportation unit is locked by user &1

Self-Explanatory Message

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/SCWM/DELIVERY504 - Details

• The SAP error message /SCWM/DELIVERY504 indicates that an attempt to assign a transportation unit (TU) to a delivery is being blocked because the TU is currently locked by another user. This can happen in the SAP Extended Warehouse Management (EWM) module when multiple users are trying to access or modify the same transportation unit simultaneously.
  
  Cause:
  
  
  User Lock: The transportation unit is locked by another user who is currently processing it. This could be due to various reasons, such as:
  
  The user is in the middle of a transaction involving the TU.
  The user has not released the lock after completing their task.
  A system error or timeout that left the TU in a locked state.
  
  
  
  System Configuration: There may be configuration settings that dictate how locks are managed in the system, which could lead to more frequent locking scenarios.
  
  
  
  Solution:
  
  
  Identify the Locking User: 
  
  Check the system to identify which user has locked the transportation unit. You