How To Fix /SCWM/PSA026 - Open warehouse task &1 already exists for kanban &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/PSA -

• Message number: 026

• Message text: Open warehouse task &1 already exists for kanban &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/PSA026 - Open warehouse task &1 already exists for kanban &2 ?

  The SAP error message /SCWM/PSA026 Open warehouse task &1 already exists for kanban &2 typically occurs in the context of the SAP Extended Warehouse Management (EWM) module, particularly when dealing with Kanban processes. This error indicates that there is already an open warehouse task associated with the specified Kanban container, which prevents the system from creating a new task for the same Kanban.
  Cause:
  
  Existing Warehouse Task: The primary cause of this error is that there is already an open warehouse task (WT) for the specified Kanban container. This can happen if a task was not completed or was left open due to an error in processing.
  Concurrency Issues: If multiple users or processes are trying to create or modify tasks for the same Kanban container simultaneously, it can lead to this error.
  System Configuration: There may be configuration settings in the EWM system that are not aligned with the expected behavior for Kanban processing.
  
  Solution:
  
  
  Check Open Warehouse Tasks: 
  
  Use transaction codes like /SCWM/WT or /SCWM/PRDI to check for any open warehouse tasks related to the specified Kanban container. 
  If you find an open task, you may need to complete or cancel it before creating a new one.
  
  
  
  Complete or Cancel the Task: 
  
  If the existing task is valid and should be completed, ensure that the necessary actions are taken to finish it.
  If the task is no longer needed, you can cancel it to free up the Kanban container for new tasks.
  
  
  
  Review Kanban Configuration: 
  
  Check the configuration settings for Kanban in the EWM system to ensure they are set up correctly. This includes reviewing the Kanban control cycle and the associated warehouse processes.
  
  
  
  Monitor for Concurrency Issues: 
  
  If the issue is related to multiple users or processes, consider implementing locking mechanisms or reviewing user access to prevent concurrent modifications.
  
  
  
  Consult Documentation: 
  
  Refer to SAP documentation or notes related to Kanban processing in EWM for any specific guidelines or troubleshooting steps.
  
  
  
  Contact SAP Support: 
  
  If the issue persists and you cannot resolve it, consider reaching out to SAP support for further assistance. Provide them with the error message details and any relevant logs or screenshots.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in EWM, such as /SCWM/WT for warehouse tasks and /SCWM/PRDI for processing inbound deliveries.
  EWM Configuration: Understanding the configuration of Kanban in EWM can help prevent similar issues in the future.
  User Training: Ensure that users are trained on the proper handling of warehouse tasks and Kanban processes to minimize errors.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate actions to resolve it.