How To Fix /SAPAPO/OM_UPGRADE126 - Characteristic & was not adjusted, since not unique in R/3 class system

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/OM_UPGRADE -

• Message number: 126

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

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OM_UPGRADE126 - Characteristic & was not adjusted, since not unique in R/3 class system ?

  The SAP error message /SAPAPO/OM_UPGRADE126 indicates that a characteristic in the R/3 class system is not unique, which is causing issues during the upgrade or data transfer process in SAP Advanced Planning and Optimization (APO). This error typically arises when there are multiple characteristics with the same name or identifier in the R/3 system, leading to ambiguity in the APO system.
  Cause:
  
  
  Non-Unique Characteristics: The primary cause of this error is that the characteristic specified in the error message is not unique in the R/3 class system. This can happen if:
  
  There are multiple characteristics with the same name in different classes.
  The characteristics are not properly defined or managed in the R/3 system.
  
  
  
  Data Inconsistency: There may be inconsistencies in the data between the R/3 and APO systems, particularly if the systems have not been synchronized properly.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Non-Unique Characteristics:
  
  Use transaction codes like CL02 (Change Class) or CL03 (Display Class) in the R/3 system to check for characteristics that have the same name.
  Look for characteristics that are defined in multiple classes.
  
  
  
  Rename or Remove Duplicates:
  
  If you find duplicate characteristics, consider renaming them to ensure uniqueness.
  Alternatively, if certain characteristics are not needed, you can remove them from the classes.
  
  
  
  Adjust Class Definitions:
  
  Ensure that each characteristic is defined in a way that it is unique across the classes in the R/3 system.
  Review the class hierarchy and make necessary adjustments.
  
  
  
  Re-run the Upgrade or Data Transfer:
  
  After making the necessary changes, re-run the upgrade or data transfer process to see if the error persists.
  
  
  
  Check for Additional Errors:
  
  Monitor for any additional error messages that may arise during the process, as they may provide further insights into other potential issues.
  
  
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide additional guidance or patches related to this error. You can search the SAP Support Portal for notes related to /SAPAPO/OM_UPGRADE126.
  Documentation: Review the SAP documentation for APO and R/3 integration to understand the expected behavior and requirements for characteristics and classes.
  Testing: After resolving the issue, conduct thorough testing to ensure that the changes do not affect other functionalities in the system.
  
  By following these steps, you should be able to resolve the /SAPAPO/OM_UPGRADE126 error and ensure that your characteristics are properly defined and unique in the R/3 class system.