How To Fix PMMO_BASIS002 - Class &1 is not a subclass of &2

SAP Error Message - Details

• Message type: E = Error

• Message class: PMMO_BASIS - Messages for PMMO Basis Objects

• Message number: 002

• Message text: Class &1 is not a subclass of &2

What causes this issue?

Class &v1& is not a subclass of &v2&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Use input help to select a valid subclass.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PMMO_BASIS002 - Class &1 is not a subclass of &2 ?

  The SAP error message PMMO_BASIS002 indicates that there is a problem with class inheritance in the context of the SAP system. Specifically, the error message states that a certain class (denoted as &1) is not a subclass of another class (denoted as &2). This typically occurs in the context of object-oriented programming within SAP, particularly when dealing with Business Object Processing (BOPF) or similar frameworks.
  Cause:
  
  Incorrect Class Hierarchy: The class &1 is expected to inherit from class &2, but it does not. This could be due to a misconfiguration or an error in the class definition.
  Typographical Errors: There may be a typo in the class name or in the definition of the class hierarchy.
  Changes in Class Structure: If the class structure has been modified (e.g., a class was deleted or renamed), it could lead to this error.
  Transport Issues: If the classes were transported from one system to another, there might be inconsistencies in the class definitions.
  
  Solution:
  
  Check Class Definitions: Verify the class definitions in the SAP system. Ensure that class &1 is indeed intended to be a subclass of class &2. You can do this by navigating to the class in the ABAP Workbench (transaction SE24).
  Correct Inheritance: If the inheritance is incorrect, modify the class definition of &1 to ensure it properly inherits from &2.
  Review Transport Requests: If the issue arose after a transport, check the transport logs and ensure that all necessary objects were transported correctly.
  Recompile Classes: Sometimes recompiling the classes can resolve issues related to inconsistencies. You can do this in SE24 by selecting the class and choosing the option to activate or recompile.
  Check for Dependencies: Ensure that all dependencies and related classes are correctly defined and activated.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE24 (Class Builder) to view and edit class definitions, and SE80 (Object Navigator) for a broader view of the object structure.
  Documentation: Refer to SAP documentation on object-oriented programming and class definitions for more detailed guidance on class hierarchies.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for the error message or related keywords in the SAP Support Portal.
  
  If the problem persists after following these steps, consider reaching out to your SAP Basis or ABAP development team for further assistance.