How To Fix IW171 - Selection: by general maint.task list w/o assembly reference

IW171 - Overview

• Message type: E = Error

• Message class: IW - Order Processing

• Message number: 171

• Message text: Selection: by general maint.task list w/o assembly reference

What causes this issue?

You want to include a <GL:general_maintenance_task_list>general task
list</> in your <GL:maintenance_order>maintenance order</>. The
<GL:bill_of_material>BOM</> of the <GL:reference_object>reference
object</> or the reference object material in the order contains no
<GL:assembly>assemblies</>.

System Response

Once you have started the search, the system looks for general
maintenance task lists that do not refer to an assembly in their header
data.

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.

IW171 - Details

• The SAP error message IW171 ("Selection: by general maint. task list w/o assembly reference") typically occurs in the context of maintenance planning and execution within the SAP system, particularly when working with maintenance task lists. This error indicates that the system is unable to find a general maintenance task list that is associated with the specified assembly or equipment.
  
  Cause:
  
  Missing Assembly Reference: The maintenance task list you are trying to access does not have an associated assembly reference. This can happen if the task list was created without linking it to a specific equipment or functional location.
  Incorrect Selection Criteria: The selection criteria used to retrieve the task list may not match any existing task lists in the system.
  Data Inconsistency: There may be inconsistencies in the data, such as missing or incorrect entries in the task list or equipment master data.
  
  
  Solution:
  
  
  Check Task List Configuration:
  
  Go to the transaction code IA05 (Display General Maintenance