How To Fix DIWP1153 - Change in task list (hierarchy) reference

SAP Error Message - Details

• Message type: E = Error

• Message class: DIWP1 - Revision Planning

• Message number: 153

• Message text: Change in task list (hierarchy) reference

Self-Explanatory Message

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• What is the cause and solution for SAP error message DIWP1153 - Change in task list (hierarchy) reference ?

  The SAP error message DIWP1153, which states "Change in task list (hierarchy) reference," typically occurs in the context of SAP's Project System (PS) or when dealing with task lists in the context of production planning or maintenance. This error indicates that there has been a change in the hierarchy of the task list that is being referenced, which can lead to inconsistencies or issues in processing.
  Causes:
  
  Hierarchy Changes: The most common cause is that the hierarchy of the task list has been modified. This could involve adding, removing, or changing the structure of tasks within the task list.
  Data Inconsistency: If there are inconsistencies in the data, such as references to tasks that no longer exist or have been moved, this error can occur.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access or modify the task list, leading to this error.
  System Updates: Changes made during system updates or migrations can also lead to this error if the task list references are not properly updated.
  
  Solutions:
  
  Check Task List Hierarchy: Review the task list hierarchy to ensure that it is correctly structured and that all referenced tasks exist. You can do this by navigating to the relevant transaction (e.g., CA03 for displaying task lists) and checking the hierarchy.
  Recreate or Adjust Task Lists: If the hierarchy has changed significantly, consider recreating the task list or adjusting it to align with the current structure.
  Data Consistency Check: Run consistency checks on the task lists to identify any discrepancies. This can often be done through specific SAP transactions or reports designed for this purpose.
  Authorization Check: Ensure that the user has the necessary authorizations to access and modify the task list. This may involve checking user roles and permissions in the SAP system.
  Consult Documentation: Refer to SAP documentation or notes related to this error message for any specific guidance or patches that may address the issue.
  Contact SAP Support: If the issue persists and cannot be resolved through the above steps, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CA03 (Display Task List), CA02 (Change Task List), and others related to task list management.
  SAP Notes: Check for any SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and resolve the DIWP1153 error effectively.