How To Fix WER_CUST002 - Interface &1 doesn't implement interface &2.

WER_CUST002 - Overview

• Message type: E = Error

• Message class: WER_CUST -

• Message number: 002

• Message text: Interface &1 doesn't implement interface &2.

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message WER_CUST002 - Interface &1 doesn't implement interface &2. ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WER_CUST002 Interface &1 doesn't implement interface &2.
  
  Meaning / 
  Cause:
  This error occurs when a program or configuration expects an interface (let's call it Interface A) to implement another interface (Interface B), but Interface A does not actually implement Interface B.
  In other words, the system is trying to treat an interface as if it inherits or includes another interface, but this is not the case in the ABAP Dictionary or class/interface definitions.
  This often happens in scenarios involving:
  
  BAdI (Business Add-Ins) implementations
  Enhancement Frameworks
  Custom interfaces in ABAP Objects where interface inheritance is expected
  Configuration or coding errors where the wrong interface is assigned or referenced
  
  
  Typical Scenario:
  
  You have an interface ZIF_INTERFACE_A.
  The system expects ZIF_INTERFACE_A to implement ZIF_INTERFACE_B.
  But ZIF_INTERFACE_A does not list ZIF_INTERFACE_B in its interface inheritance.
  When the system checks this relationship (e.g., during runtime or activation), it throws this error.
  
  
  
  Solution:
  
  
  Check Interface Definitions:
  
  Go to transaction SE24 (Class