How To Fix WPS01053 - Task list &2 (type &1) is still used in notifications

SAP Error Message - Details

• Message type: E = Error

• Message class: WPS01 - Revision Planning - Task List Hierarchy

• Message number: 053

• Message text: Task list &2 (type &1) is still used in notifications

Self-Explanatory Message

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• What is the cause and solution for SAP error message WPS01053 - Task list &2 (type &1) is still used in notifications ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WPS01053 - Task list &2 (type &1) is still used in notifications
  
  Meaning / Cause:
  This error occurs when you try to delete or change a task list (maintenance task list) in SAP, but the system detects that this task list is still referenced or assigned in one or more maintenance notifications. Since the task list is actively used in notifications, SAP prevents the deletion or certain changes to maintain data consistency and integrity.
  
  &2 = Task list number  
  &1 = Task list type (e.g., PM01 for equipment task list, PM02 for functional location task list)
  
  
  When does it occur?
  
  When attempting to delete a task list that is assigned to one or more maintenance notifications.
  When trying to change the status or certain attributes of a task list that is still linked to notifications.
  
  
  Why is this a problem?
  
  Notifications reference task lists to describe the work to be done.
  Deleting or modifying a task list that is still in use could lead to inconsistencies or loss of important maintenance data.
  SAP enforces this check to ensure data integrity.
  
  
  How to check which notifications are using the task list?
  You can find the notifications referencing the task list by:
  
  Using transaction IW28 (Change Notifications) or IW29 (Display Notifications) with selection criteria for the task list number and type.
  Or by querying tables such as QMEL (notifications) and PLKO/PLPO (task lists) with appropriate joins.
  
  
  Solution / How to resolve:
  
  
  Identify all notifications using the task list:
  
  Use IW28/IW29 or custom reports to list all notifications referencing the task list.
  
  
  
  Process or close the notifications:
  
  If the notifications are still open, process them to completion or close them if no longer needed.
  Once notifications are completed or deleted, the task list will no longer be referenced.
  
  
  
  Remove the task list assignment from notifications (if applicable):
  
  If possible, remove or change the task list assignment in the notifications.
  
  
  
  After all references are removed, retry the deletion or change:
  
  Once no notifications reference the task list, you can delete or modify it without error.
  
  
  
  
  Additional Notes:
  
  Sometimes, notifications may be in status "Created" or "In Process" and still reference the task list.
  If you cannot delete the notifications (e.g., due to business rules), consider whether the task list should be deleted or just set to a status that prevents further use.
  Always ensure that deleting task lists or notifications complies with your organization's maintenance and audit policies.
  
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Task list is still assigned to one or more maintenance notifications.
  
  
  Effect
  SAP prevents deletion or certain changes to maintain data integrity.
  
  
  Solution
  Identify and close/delete notifications referencing the task list, then retry the operation.
  
  
  Transactions
  IW28, IW29 (notifications), IA05 (delete task list), IA02 (change task list)
  
  
  
  
  If you need a specific SAP note or program to help identify the notifications, please let me know!