How To Fix IW301 - An equipment must be entered before making an assembly selection

IW301 - Overview

• Message type: E = Error

• Message class: IW - Order Processing

• Message number: 301

• Message text: An equipment must be entered before making an assembly selection

What causes this issue?

You want to select an <GL:assembly>assembly</>, but have not entered an
<GL:equipment>equipment</> for this <GL:maintenance_order>maintenance
order</>.

System Response

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

How to fix this error?

You can proceed in one of the two following ways:
You can continue processing the PM order without entering an assembly.
You can enter an equipment with a <GL:bill_of_material>bill of
material</> as a reference object in the header data screen. If the
bill of material contains one or more assemblies, you can select them.

Error message extract from SAP system. Copyright SAP SE.

IW301 - Details

• The SAP error message IW301, which states "An equipment must be entered before making an assembly selection," typically occurs in the context of maintenance or work order processing in the SAP system, particularly when dealing with equipment and assemblies in the Plant Maintenance (PM) module.
  
  Cause:
  This error arises when you attempt to select an assembly or component for a maintenance order or work order without specifying the equipment to which the assembly is related. The system requires that you first identify the equipment before it can allow you to make any selections related to assemblies or components.
  
  Solution:
  To resolve this error, you should follow these steps:
  
  
  Enter Equipment Information:
  
  Navigate to the transaction where you are encountering the error (e.g., IW31 for creating a work order).
  Ensure that you have entered the relevant equipment number in the appropriate field. This is usually found in the "Equipment" field of the work order or maintenance order.
  
  
  
  Check Equipment