How To Fix WPS01212 - Task list & & & is not hierarchical

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 212

• Message text: Task list & & & is not hierarchical

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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• What is the cause and solution for SAP error message WPS01212 - Task list & & & is not hierarchical ?

  SAP Error Message:
  WPS01212 Task list & & & is not hierarchical
  
  Cause
  This error occurs when you try to perform an operation that requires a hierarchical task list, but the task list you are using is not defined as hierarchical. In SAP Plant Maintenance (PM) or Production Planning (PP), task lists can be either:
  
  Single-level (non-hierarchical): Tasks are listed without any parent-child relationships.
  Hierarchical: Tasks are structured with main tasks and sub-tasks, showing a clear hierarchy.
  
  If the system expects a hierarchical task list (for example, when creating a maintenance order or when using certain functions that require task breakdowns), but the task list is flat (non-hierarchical), this error is triggered.
  
  When does it typically occur?
  
  When you try to use a single-level task list in a process or transaction that requires a multi-level (hierarchical) task list.
  When you try to assign or copy a task list that is not hierarchical into a context that demands hierarchy.
  During order