How To Fix /SCWM/GTS018 - Previous document number could not be changed; warehouse tasks exist

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/GTS -

• Message number: 018

• Message text: Previous document number could not be changed; warehouse tasks exist

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/GTS018 - Previous document number could not be changed; warehouse tasks exist ?

  The SAP error message /SCWM/GTS018 indicates that a previous document number cannot be changed because there are existing warehouse tasks associated with it. This typically occurs in the context of warehouse management processes where certain documents (like transfer orders or delivery documents) are linked to warehouse tasks that are already created and processed.
  Cause:
  
  Existing Warehouse Tasks: The primary reason for this error is that there are warehouse tasks that have already been created based on the document you are trying to change. SAP does not allow changes to the document number if it would affect the integrity of the associated warehouse tasks.
  Document Status: The document may be in a status that does not allow changes, especially if it has already been processed or partially processed in the warehouse.
  System Configuration: There may be specific configurations or settings in your SAP system that prevent changes to documents with existing warehouse tasks.
  
  Solution:
  
  Check Warehouse Tasks: Review the existing warehouse tasks associated with the document. You can do this by navigating to the relevant transaction in SAP (e.g., using the transaction code /SCWM/PRT for warehouse tasks) and identifying the tasks linked to the document.
  Complete or Delete Warehouse Tasks: If the warehouse tasks are not needed, you may need to complete or delete them before attempting to change the document number. Ensure that this action is in line with your business processes and that it will not disrupt ongoing operations.
  Change Document Status: If the document is in a status that prevents changes, you may need to change its status to allow modifications. This could involve completing certain processes or workflows.
  Consult Documentation: Refer to SAP documentation or your organization's internal guidelines for handling warehouse tasks and document changes. There may be specific procedures to follow.
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with SAP experts who can provide guidance based on your specific system configuration and business processes.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SCWM/PRT for warehouse tasks, /SCWM/TO for transfer orders, and /SCWM/ORD for order management.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that could resolve the issue.
  User Roles and Permissions: Ensure that you have the necessary permissions to make changes to documents and warehouse tasks in the system.
  
  By following these steps, you should be able to address the error message and proceed with your warehouse management activities.