How To Fix CL789 - Class & cannot have different hierarchy levels

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 789

• Message text: Class & cannot have different hierarchy levels

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 CL789 - Class & cannot have different hierarchy levels ?

  The SAP error message CL789 indicates that there is an issue with the class hierarchy in the classification system. Specifically, it means that the class you are trying to create or modify cannot have different hierarchy levels. This typically occurs when you are trying to assign a class to a hierarchy that does not match the expected structure.
  Cause:
  
  Hierarchy Level Mismatch: The class you are trying to assign is at a different hierarchy level than what is allowed. For example, you might be trying to assign a subclass to a superclass that is not in the same hierarchy level.
  Incorrect Class Type: The class type you are using may not support the hierarchy structure you are trying to implement.
  Configuration Issues: There may be configuration settings in the classification system that are not set up correctly, leading to this error.
  
  Solution:
  
  Check Class Hierarchy: Review the class hierarchy you are working with. Ensure that the class you are trying to assign is at the correct level in the hierarchy.
  Adjust Class Assignment: If you find that the class is at the wrong level, you may need to adjust its assignment or create a new class that fits the hierarchy correctly.
  Review Class Types: Ensure that the class types you are using are compatible with the hierarchy levels you are trying to implement.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on class hierarchy and classification settings.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  
  Related Information:
  
  Class Types: Understand the different class types in SAP and how they relate to hierarchy levels.
  Classification System: Familiarize yourself with the SAP classification system, including how to create and manage classes and their hierarchies.
  Transaction Codes: Use transaction codes like CL02 (Change Class) or CL03 (Display Class) to review and modify class settings.
  SAP Community: Engage with the SAP Community or forums for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the CL789 error and ensure that your class hierarchy is set up correctly in SAP.