How To Fix DIWP1226 - Task list &1 &2 &3 is not valid at key date

SAP Error Message - Details

• Message type: E = Error

• Message class: DIWP1 - Revision Planning

• Message number: 226

• Message text: Task list &1 &2 &3 is not valid at key date

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DIWP1226 - Task list &1 &2 &3 is not valid at key date ?

  The SAP error message DIWP1226 indicates that a task list (or a specific operation within a task list) is not valid at the specified key date. This typically occurs in the context of production planning or maintenance planning when the system is trying to access a task list that is either not valid or has been changed in a way that makes it invalid for the given date.
  Causes:
  
  Task List Validity Period: The task list may have a defined validity period, and the key date falls outside this range. Task lists can be set to be valid only for certain dates.
  Task List Status: The task list might be in a status that does not allow it to be used (e.g., it could be marked as "obsolete" or "inactive").
  Changes in Task List: If the task list has been modified (e.g., operations added or removed) after the key date, it may not be valid for that date.
  Missing Data: Required data for the task list may be missing or incomplete, leading to its invalidation.
  
  Solutions:
  
  
  Check Validity Dates: Review the validity dates of the task list in question. Ensure that the key date you are using falls within the valid range.
  
  You can check this in the task list maintenance transaction (e.g., CA01, CA02).
  
  
  
  Review Task List Status: Ensure that the task list is active and not marked as obsolete or inactive. If it is inactive, you may need to reactivate it or create a new version.
  
  
  Update Task List: If the task list has been modified, ensure that the changes are saved and that the task list is valid for the key date you are trying to use.
  
  
  Consult Documentation: If you are unsure about the task list's configuration, consult the relevant SAP documentation or your organization's SAP support team for guidance on task list management.
  
  
  Use Alternative Task Lists: If the task list is not valid for the key date, consider using an alternative task list that is valid for that date.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CA01 (Create Task List), CA02 (Change Task List), and CA03 (Display Task List) to manage task lists effectively.
  SAP Notes: Check for any SAP Notes related to this error message for additional insights or patches that may address known issues.
  User Authorization: Ensure that you have the necessary authorizations to view and modify task lists in the system.
  
  If the issue persists after checking these aspects, it may be beneficial to involve your SAP support team or consult with an SAP expert for further troubleshooting.