How To Fix IW323 - Task list selection for order from maintenance plan not allowed

IW323 - Overview

• Message type: E = Error

• Message class: IW - Order Processing

• Message number: 323

• Message text: Task list selection for order from maintenance plan not allowed

What causes this issue?

You want to allocate a <GL:maintenance_task_list>task list</> to a PM
order that was created from a
<GL:preventive_maintenance_plan>maintenance plan</>. This is not
possible, since a task list has already been allocated in the
maintenance plan. You can no longer change this allocation in the PM
order.

System Response

INCLUDE 'KEINE-FUNKTION' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

IW323 - Details

• The SAP error message IW323, which states "Task list selection for order from maintenance plan not allowed," typically occurs in the context of maintenance planning and order management within the SAP system. This error indicates that there is an issue with the task list associated with a maintenance order that is being generated from a maintenance plan.
  Causes:
  
  Task List Not Assigned: The maintenance plan may not have a valid task list assigned to it. This can happen if the task list is not created or linked properly.
  Task List Type: The type of task list being used may not be compatible with the maintenance order. For example, if the task list is of a type that is not allowed for the specific maintenance order.
  Order Type Restrictions: The order type being used may have restrictions that prevent the selection of a task list from the maintenance plan.
  Status of Task List: The task list