How To Fix WES_OUTBOUND049 - Class &1 is not abstract or derived from &2

WES_OUTBOUND049 - Overview

• Message type: E = Error

• Message class: WES_OUTBOUND - Messages for Outbound Services

• Message number: 049

• Message text: Class &1 is not abstract or derived from &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.

WES_OUTBOUND049 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WES_OUTBOUND049 Class &1 is not abstract or derived from &2
  
  Meaning / 
  Cause:
  This error occurs in the context of SAP PI/PO (Process Integration / Process Orchestration) or SAP middleware when dealing with outbound proxy or adapter communication.
  
  The message indicates that a class (represented by placeholder &1) is expected to be either abstract or derived from another class (represented by &2), but it is not.
  Typically, this happens during runtime when the system tries to instantiate or use a class for outbound processing, but the class does not meet the inheritance or abstraction requirements.
  This can be caused by:
  Incorrect or missing implementation of the class.
  The class assigned in the configuration is not the correct one.
  A mismatch between the expected interface/class and the actual class used.
  Custom adapter modules or user-defined classes that do not follow the required inheritance structure.
  
  
  
  
  Where it occurs:
  
  In SAP PI/PO during