How To Fix /SAPAPO/OM_UPGRADE127 - Class & was not adjusted, since not unique in R/3 class system

/SAPAPO/OM_UPGRADE127 - Overview

• Message type: E = Error

• Message class: /SAPAPO/OM_UPGRADE -

• Message number: 127

• Message text: Class & was not adjusted, since not unique in R/3 class system

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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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OM_UPGRADE127 - Class & was not adjusted, since not unique in R/3 class system ?

  The SAP error message /SAPAPO/OM_UPGRADE127 Class & was not adjusted, since not unique in R/3 class system typically occurs during the upgrade or migration process of SAP Advanced Planning and Optimization (APO) systems. This error indicates that there is a problem with the classification of objects in the R/3 class system, specifically that the class in question is not unique.
  
  Cause:
  
  Non-Unique Class Names: The error arises when there are multiple classes with the same name in the R/3 system. SAP requires that class names be unique to ensure proper mapping and functionality during the upgrade process.
  Data Inconsistencies: There may be inconsistencies in the data or configuration settings between the APO and R/3 systems.
  Custom Developments: Custom classes or modifications in the R/3 system may lead to conflicts during the upgrade.
  
  
  Solution:
  
  
  Identify Duplicate Classes:
  
  Use transaction codes like CL02 (Change Class) or CL03 (Display Class) in the R/3 system to check for classes with the