How To Fix IAOM_OM004 - Purchase Order &1 Item &2 is already assigned to Work Order &3 Item &4

IAOM_OM004 - Overview

• Message type: E = Error

• Message class: IAOM_OM - Outsourced Manufacturing

• Message number: 004

• Message text: Purchase Order &1 Item &2 is already assigned to Work Order &3 Item &4

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IAOM_OM004 - Purchase Order &1 Item &2 is already assigned to Work Order &3 Item &4 ?

  The SAP error message IAOM_OM004 indicates that a Purchase Order (PO) item is already assigned to a Work Order item. This typically occurs in the context of SAP's Plant Maintenance (PM) or Controlling (CO) modules, where resources and materials are managed in relation to work orders.
  
  Cause:
  The error arises when you attempt to assign a PO item to a work order that has already been linked to that item. This can happen due to:
  
  Duplicate Assignment: The same PO item is already assigned to another work order.
  Incorrect Data Entry: There may be a mistake in the data entry process, leading to an attempt to reassign an already assigned item.
  System 
  Configuration Issues: There may be configuration settings in the system that are not allowing the assignment due to business rules.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Assignments:
  
  Use transaction codes like IW33 (Display Work Order) or IW32 (Change Work Order)