How To Fix /SAPAPO/MC01126 - Definition uses the inactive class &

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/MC01 -

• Message number: 126

• Message text: Definition uses the inactive class &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/MC01126 - Definition uses the inactive class & ?

  The SAP error message /SAPAPO/MC01126 Definition uses the inactive class & typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an attempt to use a class or characteristic that has been marked as inactive. This can happen in various scenarios, such as when working with master data, planning objects, or during the execution of planning runs.
  Cause:
  
  Inactive Class: The primary cause of this error is that the class or characteristic being referenced in the planning object or master data is inactive. Inactive classes cannot be used in planning processes.
  Data Consistency Issues: There may be inconsistencies in the data where the system is trying to reference a class that has been deactivated or not properly maintained.
  Configuration Changes: Changes in the configuration of classes or characteristics may lead to some classes being marked as inactive, which can cause this error when they are still referenced in other objects.
  
  Solution:
  
  
  Activate the Class: 
  
  Go to the transaction code CL02 (Change Class) or CL01 (Create Class) in SAP.
  Check the status of the class that is causing the error. If it is inactive, activate it.
  Ensure that all necessary characteristics are also active.
  
  
  
  Check Master Data: 
  
  Review the master data that is using the class. Ensure that it is correctly assigned and that there are no references to inactive classes.
  If necessary, update the master data to remove references to inactive classes.
  
  
  
  Data Consistency Check: 
  
  Perform a consistency check on the relevant data objects to ensure that there are no inconsistencies that could lead to this error.
  Use transaction codes like CLOI (Class Overview) to analyze the classes and their usage.
  
  
  
  Review Configuration: 
  
  If the issue persists, review the configuration settings related to classes and characteristics in the SAP APO system.
  Ensure that all relevant settings are correctly configured and that there are no discrepancies.
  
  
  
  Consult Documentation: 
  
  Refer to SAP documentation or notes related to this error message for any specific guidance or patches that may be applicable.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CL01, CL02, CL03 (Display Class), and CLOI for class overview.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message.
  User Authorization: Ensure that you have the necessary authorizations to make changes to classes and master data in the system.
  
  By following these steps, you should be able to resolve the error message /SAPAPO/MC01126 Definition uses the inactive class & and ensure that your planning processes run smoothly.