How To Fix WPS01111 - Unidentifiable superordinate task list in hierarchy table

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 111

• Message text: Unidentifiable superordinate task list in hierarchy table

Self-Explanatory Message

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• What is the cause and solution for SAP error message WPS01111 - Unidentifiable superordinate task list in hierarchy table ?

  Certainly! Here's a detailed explanation for the SAP error message WPS01111 - Unidentifiable superordinate task list in hierarchy table:
  
  Error Message
  WPS01111: Unidentifiable superordinate task list in hierarchy table
  
  Cause
  This error occurs when SAP cannot find or identify the superordinate (parent) task list in the task list hierarchy table during processing. In SAP Plant Maintenance (PM) or Production Planning (PP), task lists can be structured hierarchically, where a main task list (superordinate) can have sub-task lists (subordinate). The system maintains this hierarchy in a specific table (e.g., PLFH for task list headers or PLAS for task list hierarchy).
  The error typically arises due to one or more of the following reasons:
  
  The superordinate task list referenced in the hierarchy does not exist or has been deleted.
  The hierarchy table entries are inconsistent or corrupted.
  Incorrect or missing entries in the task list hierarchy table.
  Data inconsistencies caused by manual database changes or incomplete transport/import.
  The system is trying to process a sub-task list but cannot find its parent task list in the hierarchy.
  
  
  Solution
  To resolve the error, follow these steps:
  
  
  Check the Task List Hierarchy:
  
  Use transaction IA05 (Display Task List Hierarchy) or IA06 (Change Task List Hierarchy) to review the hierarchy.
  Verify that the superordinate task list exists and is valid.
  
  
  
  Verify Task List Existence:
  
  Check if the superordinate task list number exists in the system using transaction IA03 (Display Task List).
  If missing, recreate or restore the superordinate task list.
  
  
  
  Check Table Entries:
  
  Use SE16/SE16N to check the entries in the hierarchy table PLAS.
  Look for orphaned subordinate task lists that reference a non-existent superordinate task list.
  
  
  
  Rebuild or Correct the Hierarchy:
  
  If inconsistencies are found, correct the hierarchy by:
  
  Deleting invalid entries.
  Reassigning sub-task lists to the correct superordinate task list.
  Recreating the hierarchy if necessary.
  
  
  
  
  
  Transport and Data Consistency:
  
  If the issue appeared after a transport/import, verify that all related task lists and hierarchy data were correctly imported.
  Re-import or correct transport if needed.
  
  
  
  SAP Notes and Support:
  
  Check for relevant SAP Notes that address known issues with task list hierarchies.
  If the problem persists, consider raising a support ticket with SAP, providing details of the task lists and hierarchy.
  
  
  
  
  Related Information
  
  
  Task List Hierarchy Tables:
  
  PLAS - Task List Hierarchy
  PLFH - Task List Header
  PLKO - Task List Header (PP)
  PLPO - Task List Operations
  
  
  
  Transactions:
  
  IA03 - Display Task List
  IA05 - Display Task List Hierarchy
  IA06 - Change Task List Hierarchy
  SE16/SE16N - Table Browser for checking data
  
  
  
  SAP Modules:
  
  Plant Maintenance (PM)
  Production Planning (PP)
  
  
  
  Common Scenarios:
  
  When creating or changing task lists with hierarchical structures.
  During mass changes or data migration.
  After system upgrades or transport imports.
  
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Missing or invalid superordinate task list in the hierarchy table (PLAS).
  
  
  Effect
  System cannot identify the parent task list, causing error WPS01111.
  
  
  Solution
  Verify and correct the task list hierarchy using IA05/IA06, check tables PLAS/PLFH, and ensure data consistency.
  
  
  Tools
  IA03, IA05, IA06, SE16N, SAP Notes, SAP Support.
  
  
  
  
  If you need help with specific steps or transaction codes, feel free to ask!