How To Fix /SCWM/UI138 - Warehouse task exists already (internally) for HU &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/UI -

• Message number: 138

• Message text: Warehouse task exists already (internally) for HU &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/UI138 - Warehouse task exists already (internally) for HU &1 ?

  The SAP error message /SCWM/UI138 Warehouse task exists already (internally) for HU &1 typically occurs in the SAP Extended Warehouse Management (EWM) module when there is an attempt to create a warehouse task (WT) for a Handling Unit (HU) that already has an existing warehouse task associated with it. This can happen in various scenarios, such as during the picking, putaway, or stock transfer processes.
  Cause:
  
  Duplicate Warehouse Task: The most common cause is that a warehouse task for the specified handling unit already exists in the system. This can happen if the system is trying to create a new task for an HU that is already being processed or has an active task.
  System Lag: Sometimes, due to system performance issues or delays, the system may not recognize that a task has been completed or canceled, leading to the perception that a task still exists.
  Incorrect Process Flow: If the warehouse processes are not followed correctly, it may lead to situations where tasks are not properly closed or updated.
  
  Solution:
  
  Check Existing Warehouse Tasks: Use transaction codes like /SCWM/WT or /SCWM/PRDI to check for existing warehouse tasks related to the handling unit in question. If a task exists, you may need to complete or cancel it before creating a new one.
  Review Task Status: Ensure that the existing warehouse task is not in a status that prevents further processing. If it is stuck or in an error state, you may need to resolve that issue first.
  System Refresh: If you suspect a system lag, try refreshing the session or logging out and back in to see if the issue resolves itself.
  Consult Logs: Check the application logs for any additional error messages or warnings that might provide more context on why the task is still considered active.
  Manual Intervention: If necessary, you may need to manually intervene by deleting or modifying the existing warehouse task if it is no longer valid.
  Contact Support: If the issue persists and you cannot find a resolution, consider reaching out to your SAP support team or consulting SAP Notes for any known issues or patches related to this error.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in EWM, such as /SCWM/WT for warehouse tasks, /SCWM/PRDI for inbound deliveries, and /SCWM/PRDO for outbound deliveries.
  SAP Notes: Search for SAP Notes related to this error message for any specific fixes or updates that may address the issue.
  Documentation: Review SAP EWM documentation for best practices on handling warehouse tasks and managing handling units to avoid similar issues in the future.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.