How To Fix WPS01120 - Parent task list key &1 / ext. ID &2: Invalid change number

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 120

• Message text: Parent task list key &1 / ext. ID &2: Invalid change number

Self-Explanatory Message

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• What is the cause and solution for SAP error message WPS01120 - Parent task list key &1 / ext. ID &2: Invalid change number ?

  SAP Error Message:
  
  WPS01120 Parent task list key &1 / ext. ID &2: Invalid change number
  
  Meaning / Cause:
  This error occurs when you try to assign or reference a change number (change request) that is not valid or does not exist in the system for the specified parent task list. In SAP Plant Maintenance (PM) or Production Planning (PP), task lists can be managed under change management to control modifications. The system checks the validity of the change number when you attempt to link or use it.
  Common causes include:
  
  The change number does not exist in the system.
  The change number is not released or is invalid for the object type.
  The change number is not assigned to the task list or the relevant object.
  Typographical error or incorrect input of the change number.
  The change number is from a different object or task list.
  
  
  Where it occurs:
  
  When creating or changing task lists (e.g., routing, maintenance task lists) under change management.
  When assigning a change number to a parent task list or referencing it in a task list hierarchy.
  During transport or modification of task lists with change management enabled.
  
  
  Solution / How to fix:
  
  
  Verify the Change Number:
  
  Check if the change number exists in transaction CC03 (Display Change Number).
  Confirm that the change number is valid and active.
  
  
  
  Check Object Assignment:
  
  Ensure the change number is assigned to the correct object type (task list).
  Use transaction CC04 or CC02 to check/change the assignment.
  
  
  
  Check Release Status:
  
  The change number should be in a status that allows changes (e.g., not locked or released if changes are not allowed).
  If necessary, release or lock the change number appropriately.
  
  
  
  Correct Input:
  
  Make sure the change number is entered correctly without typos.
  Confirm the external ID (ext. ID) matches the change number and task list.
  
  
  
  Create a New Change Number:
  
  If the change number does not exist or is invalid, create a new change number via CC01 and assign it properly.
  
  
  
  Check Customizing:
  
  Verify that change management is properly configured for task lists in SPRO under Plant Maintenance or Production Planning.
  
  
  
  Transport Issues:
  
  If the error occurs during transport, ensure the change number and task list exist in the target system and are consistent.
  
  
  
  
  Additional Information:
  
  Change Number (Change Request): Used in Engineering Change Management (ECM) to control changes to master data and documents.
  Parent Task List: A task list that can have sub-task lists or operations linked; change management ensures controlled changes.
  Transactions:
  
  CC01 - Create Change Number
  CC02 - Change Change Number
  CC03 - Display Change Number
  CA02 - Change Task List
  CA03 - Display Task List
  
  
  
  
  Summary:
  The error WPS01120 indicates an invalid or non-existent change number assigned to a parent task list. To resolve, verify the existence, validity, and assignment of the change number, correct any input errors, and ensure proper change management configuration.
  
  If you need further help, please provide:
  
  The exact steps you performed when the error occurred.
  The change number and task list involved.
  System version and module (PM, PP, etc.).