How To Fix /PM0/ABB_INTERFACE004 - Category conflict between interface and implementing class

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/ABB_INTERFACE -

• Message number: 004

• Message text: Category conflict between interface and implementing class

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/ABB_INTERFACE004 - Category conflict between interface and implementing class ?

  The SAP error message /PM0/ABB_INTERFACE004 indicates a category conflict between an interface and its implementing class. This typically occurs in the context of ABAP programming when there is a mismatch between the expected interface and the actual implementation in the class.
  Cause:
  
  Mismatch in Method Signatures: The methods defined in the interface do not match the methods implemented in the class. This can include differences in parameter types, return types, or method names.
  Inconsistent Visibility: The visibility (public, protected, private) of the methods in the implementing class may not align with the interface definition.
  Incorrect Interface Implementation: The class may not be correctly implementing the interface, either by not implementing all required methods or by implementing methods that are not part of the interface.
  Changes in Interface: If the interface has been modified (e.g., methods added or changed) after the class was created, the class may not reflect these changes.
  
  Solution:
  
  Check Method Signatures: Review the methods defined in the interface and ensure that the implementing class has methods with the same signatures (name, parameters, return type).
  Adjust Visibility: Ensure that the visibility of the methods in the implementing class matches that of the interface.
  Implement All Required Methods: Make sure that all methods defined in the interface are implemented in the class. If any methods are missing, add them to the class.
  Update Class After Interface Changes: If the interface has been modified, update the implementing class accordingly to reflect those changes.
  Re-activate the Class: After making the necessary changes, re-activate the class to ensure that the changes take effect.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for more details on interfaces and class implementations.
  SAP Community: Engage with the SAP Community forums for discussions and solutions related to similar issues.
  Debugging Tools: Use the ABAP debugger to trace the execution and identify where the conflict arises.
  Code Inspector: Utilize the Code Inspector tool in SAP to analyze the code for potential issues related to interface implementation.
  
  By following these steps, you should be able to resolve the /PM0/ABB_INTERFACE004 error and ensure that your class correctly implements the specified interface.