How To Fix SIW119 - Extension class &1 is invalid in structure &2

SIW119 - Overview

• Message type: E = Error

• Message class: SIW - Service Implementation Workbench

• Message number: 119

• Message text: Extension class &1 is invalid in structure &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 SIW119 - Extension class &1 is invalid in structure &2 ?

  The SAP error message SIW119 indicates that there is an issue with an extension class that is considered invalid in a specific structure. This error typically arises in the context of SAP's Business Add-Ins (BAdIs) or enhancement frameworks, where custom or extended functionality is being implemented.
  
  Cause:
  
  Invalid Extension Class: The extension class specified in the error message is not recognized or is not properly defined in the system.
  Incorrect Structure: The structure in which the extension class is being used may not support the specified extension class.
  Transport Issues: If the extension class was recently transported from another system, it may not have been activated or may have dependencies that are not met.
  Naming or Typing Errors: There could be a typo in the name of the extension class or structure, or the class may not exist in the specified namespace.
  
  
  Solution:
  
  Check Extension Class: Verify that the extension class exists and is correctly defined in