How To Fix WPS01118 - Parent task list key &1 / ext. ID &2: Invalid external group no. &3

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 118

• Message text: Parent task list key &1 / ext. ID &2: Invalid external group no. &3

Self-Explanatory Message

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• What is the cause and solution for SAP error message WPS01118 - Parent task list key &1 / ext. ID &2: Invalid external group no. &3 ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WPS01118 Parent task list key &1 / ext. ID &2: Invalid external group no. &3
  
  Meaning / Cause:
  This error occurs when you try to reference or assign a parent task list in a maintenance or production order, and the system detects that the external group number specified for the parent task list is invalid or does not exist.
  
  Parent task list key &1: The key of the parent task list you are trying to use.
  External ID &2: The external identifier of the parent task list.
  Invalid external group no. &3: The external group number provided is not valid or not found in the system.
  
  In SAP Plant Maintenance (PM) or Production Planning (PP), task lists can be grouped by group numbers. When you assign a parent task list, the system checks if the external group number exists and is valid. If it is not, this error is triggered.
  
  Common Causes:
  
  The external group number (&3) does not exist in the system.
  Typographical error in the external group number.
  The parent task list key or external ID is incorrect or inconsistent.
  The external group number is not maintained or activated in the system.
  Data inconsistency or incomplete master data for task lists.
  
  
  Solution / How to Fix:
  
  
  Verify the External Group Number:
  
  Check the external group number (&3) you are entering.
  Make sure it exists in the system and is correctly maintained.
  
  
  
  Check Task List Master Data:
  
  Go to transaction IA05 (Change Task List) or IA06 (Display Task List) and verify the parent task list key and external ID.
  Confirm that the external group number is correctly assigned.
  
  
  
  Maintain External Group Number:
  
  If the external group number does not exist, create or maintain it in the system.
  Use transaction IA01 or relevant customizing to maintain group numbers.
  
  
  
  Correct the Parent Task List Assignment:
  
  If the parent task list key or external ID is wrong, correct it.
  Ensure consistency between the parent and child task lists.
  
  
  
  Check Customizing Settings:
  
  Sometimes, the external group number is linked to configuration settings.
  Verify in SPRO under Plant Maintenance ? Task Lists ? Group Numbers.
  
  
  
  Data Consistency Check:
  
  Run consistency checks or use report tools to find inconsistencies in task list data.
  
  
  
  
  Additional Information:
  
  This error is related to task list management in SAP PM or PP.
  External group numbers are used to group task lists logically and can be used for selection or reporting.
  Proper maintenance of task list master data is crucial to avoid such errors.
  If you are importing task lists from external systems, ensure that the external group numbers are mapped correctly.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error Message
  WPS01118 Parent task list key &1 / ext. ID &2: Invalid external group no. &3
  
  
  Cause
  External group number &3 is invalid or not found for the parent task list.
  
  
  Solution
  Verify and correct the external group number; maintain it if missing; check parent task list key and external ID for correctness.
  
  
  Transactions
  IA05, IA06, IA01, SPRO (customizing)
  
  
  Module
  SAP Plant Maintenance (PM), Production Planning (PP)
  
  
  
  
  If you need further assistance, please provide the exact task list key, external ID, and external group number you are using, and I can help you troubleshoot more specifically.