How To Fix DIWP1201 - You cannot assign a subordinate task list to a non-hierarchical task list

SAP Error Message - Details

• Message type: E = Error

• Message class: DIWP1 - Revision Planning

• Message number: 201

• Message text: You cannot assign a subordinate task list to a non-hierarchical task list

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DIWP1201 - You cannot assign a subordinate task list to a non-hierarchical task list ?

  The SAP error message DIWP1201 indicates that you are trying to assign a subordinate task list to a non-hierarchical task list, which is not allowed in the SAP system. This error typically arises in the context of SAP's task list management, particularly in the areas of production planning or maintenance planning.
  Cause:
  The error occurs because:
  
  Non-Hierarchical Task List: This type of task list does not support the hierarchical structure that allows for subordinate (or child) task lists. Non-hierarchical task lists are flat and do not have the capability to contain other task lists.
  Incorrect Assignment: You may be attempting to assign a subordinate task list to a task list that is not designed to handle such relationships.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Task List Type: Verify the type of task list you are working with. Ensure that you are using a hierarchical task list if you need to assign subordinate task lists.
  
  
  Change Task List Type: If you need to maintain a hierarchical structure, consider creating a new hierarchical task list instead of using a non-hierarchical one.
  
  
  Review Task List Structure: If you are unsure about the structure of your task lists, review the documentation or configuration settings in your SAP system to understand the differences between hierarchical and non-hierarchical task lists.
  
  
  Consult Documentation: Refer to SAP Help documentation or your organization's SAP guidelines for more information on task list management and the specific requirements for hierarchical task lists.
  
  
  Seek Assistance: If you are still facing issues, consider reaching out to your SAP support team or a consultant who specializes in SAP task list management for further assistance.
  
  
  Related Information:
  
  Task List Types: Familiarize yourself with the different types of task lists in SAP, including hierarchical and non-hierarchical task lists, and their respective use cases.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates related to this error message.
  Training and Documentation: Consider undergoing training or reviewing documentation related to SAP task list management to better understand how to structure and manage task lists effectively.
  
  By following these steps, you should be able to resolve the DIWP1201 error and properly manage your task lists in SAP.