How To Fix MPE_OAN126 - Reference material assignment &1, plant &2 for OA &3 version &4 not found

MPE_OAN126 - Overview

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 126

• Message text: Reference material assignment &1, plant &2 for OA &3 version &4 not found

Self-Explanatory Message

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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.

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MPE_OAN126 - Details

• The SAP error message MPE_OAN126 indicates that there is an issue with the reference material assignment for an operational asset (OA) in a specific plant. This error typically arises when the system cannot find the required reference material assignment for the specified operational asset version in the given plant.
  
  Cause:
  
  Missing Reference Material Assignment: The most common cause is that the reference material assignment for the specified operational asset does not exist in the system for the given plant and version.
  Incorrect Configuration: There may be a configuration issue where the reference material is not properly set up in the system.
  Data Inconsistency: There could be inconsistencies in the data, such as missing entries in the relevant tables.
  Versioning Issues: The version specified may not be valid or may not have been created yet.
  
  
  Solution:
  
  
  Check Reference Material Assignment:
  
  Navigate to the relevant transaction in SAP (e.g., transaction code OAN1 or OAN2) to check if the reference material